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</div> <div class="control"> <button class="button is-small is-link">Go</button> </div> </div> </form> </div> </div> <ol class="breathe-horizontal" start="1"> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/2305.02900">arXiv:2305.02900</a> <span> [<a href="https://arxiv.org/pdf/2305.02900">pdf</a>, <a href="https://arxiv.org/format/2305.02900">other</a>] </span> </p> <div class="tags is-inline-block"> <span class="tag is-small is-link tooltip is-tooltip-top" data-tooltip="Superconductivity">cond-mat.supr-con</span> <span class="tag is-small is-grey tooltip is-tooltip-top" data-tooltip="Mesoscale and Nanoscale Physics">cond-mat.mes-hall</span> <span class="tag is-small is-grey tooltip is-tooltip-top" data-tooltip="Materials Science">cond-mat.mtrl-sci</span> </div> <div class="is-inline-block" style="margin-left: 0.5rem"> <div class="tags has-addons"> <span class="tag is-dark is-size-7">doi</span> <span class="tag is-light is-size-7"><a class="" href="https://doi.org/10.1038/s41586-023-06977-7">10.1038/s41586-023-06977-7 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> Superconducting Arcs </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/cond-mat?searchtype=author&query=Kuibarov%2C+A">Andrii Kuibarov</a>, <a href="/search/cond-mat?searchtype=author&query=Suvorov%2C+O">Oleksandr Suvorov</a>, <a href="/search/cond-mat?searchtype=author&query=Vocaturo%2C+R">Riccardo Vocaturo</a>, <a href="/search/cond-mat?searchtype=author&query=Fedorov%2C+A">Alexander Fedorov</a>, <a href="/search/cond-mat?searchtype=author&query=Lou%2C+R">Rui Lou</a>, <a href="/search/cond-mat?searchtype=author&query=Merkwitz%2C+L">Luise Merkwitz</a>, <a href="/search/cond-mat?searchtype=author&query=Voroshnin%2C+V">Vladimir Voroshnin</a>, <a href="/search/cond-mat?searchtype=author&query=Facio%2C+J+I">Jorge I. Facio</a>, <a href="/search/cond-mat?searchtype=author&query=Koepernik%2C+K">Klaus Koepernik</a>, <a href="/search/cond-mat?searchtype=author&query=Yaresko%2C+A">Alexander Yaresko</a>, <a href="/search/cond-mat?searchtype=author&query=Shipunov%2C+G">Grigoriy Shipunov</a>, <a href="/search/cond-mat?searchtype=author&query=Aswartham%2C+S">Saicharan Aswartham</a>, <a href="/search/cond-mat?searchtype=author&query=Brink%2C+J+v+d">Jeroen van den Brink</a>, <a href="/search/cond-mat?searchtype=author&query=B%C3%BCchner%2C+B">Bernd B眉chner</a>, <a href="/search/cond-mat?searchtype=author&query=Borisenko%2C+S">Sergey Borisenko</a> </p> <p class="abstract mathjax"> <span class="has-text-black-bis has-text-weight-semibold">Abstract</span>: <span class="abstract-short has-text-grey-dark mathjax" id="2305.02900v1-abstract-short" style="display: inline;"> An essential ingredient for the production of Majorana fermions that can be used for quantum computing is the presence of topological superconductivity. As bulk topological superconductors remain elusive, the most promising approaches exploit proximity-induced superconductivity making systems fragile and difficult to realize. Weyl semimetals due to their intrinsic topology belong to potential cand… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2305.02900v1-abstract-full').style.display = 'inline'; document.getElementById('2305.02900v1-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="2305.02900v1-abstract-full" style="display: none;"> An essential ingredient for the production of Majorana fermions that can be used for quantum computing is the presence of topological superconductivity. As bulk topological superconductors remain elusive, the most promising approaches exploit proximity-induced superconductivity making systems fragile and difficult to realize. Weyl semimetals due to their intrinsic topology belong to potential candidates too, but search for Majorana fermions has always been connected with the superconductivity in the bulk, leaving the possibility of intrinsic superconductivity of the Fermi surface arcs themselves practically without attention, even from the theory side.Here, by means of angle-resolved photoemission spectroscopy and ab-initio calculations, we unambiguously identify topological Fermi arcs on two opposing surfaces of the non-centrosymmetric Weyl material PtBi2. We show that these states become superconducting at different temperatures around 10K. Remarkably, the corresponding coherencepeaks appear as the strongest and sharpest excitations ever detected by photoemission from solids, suggesting significant technological relevance. Our findings indicate that topological superconductivity in PtBi2 occurs exclusively at the surface, which not only makes it an ideal platform to host Majorana fermions, but may also lead to a unique quantum phase - an intrinsic topological SNS Josephson junction. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2305.02900v1-abstract-full').style.display = 'none'; document.getElementById('2305.02900v1-abstract-short').style.display = 'inline';">△ Less</a> </span> </p> <p class="is-size-7"><span class="has-text-black-bis has-text-weight-semibold">Submitted</span> 4 May, 2023; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> May 2023. </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Comments:</span> <span class="has-text-grey-dark mathjax">8 pages, 4 figures and Supplementary Information</span> </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Journal ref:</span> Nature 626, 294 (2024) </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/2203.12511">arXiv:2203.12511</a> <span> [<a href="https://arxiv.org/pdf/2203.12511">pdf</a>, <a href="https://arxiv.org/format/2203.12511">other</a>] </span> </p> <div class="tags is-inline-block"> <span class="tag is-small is-link tooltip is-tooltip-top" data-tooltip="Strongly Correlated Electrons">cond-mat.str-el</span> </div> <div class="is-inline-block" style="margin-left: 0.5rem"> <div class="tags has-addons"> <span class="tag is-dark is-size-7">doi</span> <span class="tag is-light is-size-7"><a class="" href="https://doi.org/10.1038/s41586-022-04412-x">10.1038/s41586-022-04412-x <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> Emergence of Fermi arcs and novel magnetic splitting in an antiferromagnet </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/cond-mat?searchtype=author&query=Schrunk%2C+B">Benjamin Schrunk</a>, <a href="/search/cond-mat?searchtype=author&query=Kushnirenko%2C+Y">Yevhen Kushnirenko</a>, <a href="/search/cond-mat?searchtype=author&query=Kuthanazhi%2C+B">Brinda Kuthanazhi</a>, <a href="/search/cond-mat?searchtype=author&query=Ahn%2C+J">Junyeong Ahn</a>, <a href="/search/cond-mat?searchtype=author&query=Wang%2C+L">Lin-Lin Wang</a>, <a href="/search/cond-mat?searchtype=author&query=O%60Leary%2C+E">Evan O`Leary</a>, <a href="/search/cond-mat?searchtype=author&query=Lee%2C+K">Kyungchan Lee</a>, <a href="/search/cond-mat?searchtype=author&query=Eaton%2C+A">Andrew Eaton</a>, <a href="/search/cond-mat?searchtype=author&query=Fedorov%2C+A">Alexander Fedorov</a>, <a href="/search/cond-mat?searchtype=author&query=Lou%2C+R">Rui Lou</a>, <a href="/search/cond-mat?searchtype=author&query=Voroshnin%2C+V">Vladimir Voroshnin</a>, <a href="/search/cond-mat?searchtype=author&query=Clark%2C+O+J">Oliver J. Clark</a>, <a href="/search/cond-mat?searchtype=author&query=Sanchez-Barriga%2C+J">Jaime Sanchez-Barriga</a>, <a href="/search/cond-mat?searchtype=author&query=Bud%60ko%2C+S+L">Sergey L. Bud`ko</a>, <a href="/search/cond-mat?searchtype=author&query=Slager%2C+R">Robert-Jan Slager</a>, <a href="/search/cond-mat?searchtype=author&query=Canfield%2C+P+C">Paul C. Canfield</a>, <a href="/search/cond-mat?searchtype=author&query=Kaminski%2C+A">Adam Kaminski</a> </p> <p class="abstract mathjax"> <span class="has-text-black-bis has-text-weight-semibold">Abstract</span>: <span class="abstract-short has-text-grey-dark mathjax" id="2203.12511v1-abstract-short" style="display: inline;"> The Fermi arcs are signatures of exotic states in solids because they defy conventional concept of Fermi surfaces as closed contours in momentum space. Fermi arcs were first discovered in cuprates, and caused by the pseudogap. Weyl semimetals provided another way to generate Fermi arcs by breaking either the time reversal symmetry (TRS) or inversion symmetry of a 3D Dirac semimetal, which can resu… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2203.12511v1-abstract-full').style.display = 'inline'; document.getElementById('2203.12511v1-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="2203.12511v1-abstract-full" style="display: none;"> The Fermi arcs are signatures of exotic states in solids because they defy conventional concept of Fermi surfaces as closed contours in momentum space. Fermi arcs were first discovered in cuprates, and caused by the pseudogap. Weyl semimetals provided another way to generate Fermi arcs by breaking either the time reversal symmetry (TRS) or inversion symmetry of a 3D Dirac semimetal, which can result in a Weyl semimetal with pairs of Weyl nodes that have opposite chirality. The bulk-boundary correspondence associated with the Chern number leads to the emergence of Fermi arcs on the boundary. Here, we present experimental evidence that pairs of magnetically split hole- and electron-like Fermi arcs emerge below the Neel temperature, in the antiferromagnetic (AFM) state of cubic NdBi due to a novel band splitting effect. Whereas TRS is broken by the AFM order, both inversion and nonsymmorphic TRS are preserved in the bulk, precluding the possibility of a Weyl semimetal. The observed magnetic splitting is highly unusual, as it creates bands of opposing curvature, that changes with temperature and follows the antiferromagnetic order parameter. This is completely different from previously reported cases of magnetic splittings such as traditional Zeeman and Rashba, where the curvature of the bands is preserved. Therefore, our finding represents a new Fermionic state created by new type of magnetic band splitting in the presence of a long-range AFM order that are not readily explained by existing theoretical ideas. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2203.12511v1-abstract-full').style.display = 'none'; document.getElementById('2203.12511v1-abstract-short').style.display = 'inline';">△ Less</a> </span> </p> <p class="is-size-7"><span class="has-text-black-bis has-text-weight-semibold">Submitted</span> 23 March, 2022; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> March 2022. </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Comments:</span> <span class="has-text-grey-dark mathjax">16 pages, 4 figures main text and 20 pages, 12 figures supplement</span> </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Journal ref:</span> The version of record of this article, first published in Nature, is available online at Publisher`s website: https://www.nature.com/articles/s41586-022-04412-x (2022) </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/2112.00422">arXiv:2112.00422</a> <span> [<a href="https://arxiv.org/pdf/2112.00422">pdf</a>, <a href="https://arxiv.org/format/2112.00422">other</a>] </span> </p> <div class="tags is-inline-block"> <span class="tag is-small is-link tooltip is-tooltip-top" data-tooltip="Strongly Correlated Electrons">cond-mat.str-el</span> <span class="tag is-small is-grey tooltip is-tooltip-top" data-tooltip="Mesoscale and Nanoscale Physics">cond-mat.mes-hall</span> </div> <div class="is-inline-block" style="margin-left: 0.5rem"> <div class="tags has-addons"> <span class="tag is-dark is-size-7">doi</span> <span class="tag is-light is-size-7"><a class="" href="https://doi.org/10.1103/PhysRevB.106.125138">10.1103/PhysRevB.106.125138 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> Lifetime of quasi-particles in the nearly-free electron metal Sodium </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/cond-mat?searchtype=author&query=Potorochin%2C+D+V">D. V. Potorochin</a>, <a href="/search/cond-mat?searchtype=author&query=Kurleto%2C+R">R. Kurleto</a>, <a href="/search/cond-mat?searchtype=author&query=Clark%2C+O+J">O. J. Clark</a>, <a href="/search/cond-mat?searchtype=author&query=Rienks%2C+E+D+L">E. D. L. Rienks</a>, <a href="/search/cond-mat?searchtype=author&query=Sanchez-Barriga%2C+J">J. Sanchez-Barriga</a>, <a href="/search/cond-mat?searchtype=author&query=Roth%2C+F">F. Roth</a>, <a href="/search/cond-mat?searchtype=author&query=Voroshnin%2C+V">V. Voroshnin</a>, <a href="/search/cond-mat?searchtype=author&query=Fedorov%2C+A">A. Fedorov</a>, <a href="/search/cond-mat?searchtype=author&query=Eberhardt%2C+W">W. Eberhardt</a>, <a href="/search/cond-mat?searchtype=author&query=Buechner%2C+B">B. Buechner</a>, <a href="/search/cond-mat?searchtype=author&query=Fink%2C+J">J. Fink</a> </p> <p class="abstract mathjax"> <span class="has-text-black-bis has-text-weight-semibold">Abstract</span>: <span class="abstract-short has-text-grey-dark mathjax" id="2112.00422v2-abstract-short" style="display: inline;"> We report a high-resolution angle-resolved photoemission (ARPES) study of the prototypical nearly-free-electron metal sodium. The observed mass enhancement is slightly smaller than that derived in previous studies. The new results on the lifetime broadening increase the demand for theories beyond the random phase approximation. Our results do not support the proposed strong enhancement of the scat… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2112.00422v2-abstract-full').style.display = 'inline'; document.getElementById('2112.00422v2-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="2112.00422v2-abstract-full" style="display: none;"> We report a high-resolution angle-resolved photoemission (ARPES) study of the prototypical nearly-free-electron metal sodium. The observed mass enhancement is slightly smaller than that derived in previous studies. The new results on the lifetime broadening increase the demand for theories beyond the random phase approximation. Our results do not support the proposed strong enhancement of the scattering rates of the charge carriers due to a coupling to spin fluctuations. Moreover, a comparison with earlier electron energy-loss data on sodium yields a strong reduction of the mass enhancement of dipolar electron-hole excitations compared to that of monopole hole excitations, measured by ARPES. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2112.00422v2-abstract-full').style.display = 'none'; document.getElementById('2112.00422v2-abstract-short').style.display = 'inline';">△ Less</a> </span> </p> <p class="is-size-7"><span class="has-text-black-bis has-text-weight-semibold">Submitted</span> 18 August, 2022; <span class="has-text-black-bis has-text-weight-semibold">v1</span> submitted 1 December, 2021; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> December 2021. </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Comments:</span> <span class="has-text-grey-dark mathjax">5 pages, 6 figures</span> </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/2105.15055">arXiv:2105.15055</a> <span> [<a href="https://arxiv.org/pdf/2105.15055">pdf</a>] </span> </p> <div class="tags is-inline-block"> <span class="tag is-small is-link tooltip is-tooltip-top" data-tooltip="Materials Science">cond-mat.mtrl-sci</span> <span class="tag is-small is-grey tooltip is-tooltip-top" data-tooltip="Superconductivity">cond-mat.supr-con</span> </div> <div class="is-inline-block" style="margin-left: 0.5rem"> <div class="tags has-addons"> <span class="tag is-dark is-size-7">doi</span> <span class="tag is-light is-size-7"><a class="" href="https://doi.org/10.1038/s41467-022-31841-z">10.1038/s41467-022-31841-z <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> Fermi surface tomography </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/cond-mat?searchtype=author&query=Borisenko%2C+S">Sergey Borisenko</a>, <a href="/search/cond-mat?searchtype=author&query=Fedorov%2C+A">Alexander Fedorov</a>, <a href="/search/cond-mat?searchtype=author&query=Kuibarov%2C+A">Andrii Kuibarov</a>, <a href="/search/cond-mat?searchtype=author&query=Bianchi%2C+M">Marco Bianchi</a>, <a href="/search/cond-mat?searchtype=author&query=Bezguba%2C+V">Volodymyr Bezguba</a>, <a href="/search/cond-mat?searchtype=author&query=Majchrzak%2C+P">Paulina Majchrzak</a>, <a href="/search/cond-mat?searchtype=author&query=Hofmann%2C+P">Philip Hofmann</a>, <a href="/search/cond-mat?searchtype=author&query=Baumg%C3%A4rtel%2C+P">Peter Baumg盲rtel</a>, <a href="/search/cond-mat?searchtype=author&query=Voroshnin%2C+V">Vladimir Voroshnin</a>, <a href="/search/cond-mat?searchtype=author&query=Kushnirenko%2C+Y">Yevhen Kushnirenko</a>, <a href="/search/cond-mat?searchtype=author&query=Sanches-Barriga%2C+J">Jaime Sanches-Barriga</a>, <a href="/search/cond-mat?searchtype=author&query=Varykhalov%2C+A">Andrey Varykhalov</a>, <a href="/search/cond-mat?searchtype=author&query=Ovsyannikov%2C+R">Ruslan Ovsyannikov</a>, <a href="/search/cond-mat?searchtype=author&query=Morozov%2C+I">Igor Morozov</a>, <a href="/search/cond-mat?searchtype=author&query=Aswartham%2C+S">Saicharan Aswartham</a>, <a href="/search/cond-mat?searchtype=author&query=Feya%2C+O">Oleg Feya</a>, <a href="/search/cond-mat?searchtype=author&query=Harnagea%2C+L">Luminita Harnagea</a>, <a href="/search/cond-mat?searchtype=author&query=Wurmehl%2C+S">Sabine Wurmehl</a>, <a href="/search/cond-mat?searchtype=author&query=Kordyuk%2C+A">Alexander Kordyuk</a>, <a href="/search/cond-mat?searchtype=author&query=Yaresko%2C+A">Alexander Yaresko</a>, <a href="/search/cond-mat?searchtype=author&query=Berger%2C+H">Helmuth Berger</a>, <a href="/search/cond-mat?searchtype=author&query=B%C3%BCchner%2C+B">Bernd B眉chner</a> </p> <p class="abstract mathjax"> <span class="has-text-black-bis has-text-weight-semibold">Abstract</span>: <span class="abstract-short has-text-grey-dark mathjax" id="2105.15055v1-abstract-short" style="display: inline;"> Fermi surfaces, three-dimensional (3D) abstract interfaces that define the occupied energies of electrons in a solid, are important for characterizing and predicting the thermal, electrical, magnetic, and optical properties of crystalline metals and semiconductors [1]. Angle-resolved photoemission spectroscopy (ARPES) is the only technique directly probing the Fermi surface by measuring the Fermi… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2105.15055v1-abstract-full').style.display = 'inline'; document.getElementById('2105.15055v1-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="2105.15055v1-abstract-full" style="display: none;"> Fermi surfaces, three-dimensional (3D) abstract interfaces that define the occupied energies of electrons in a solid, are important for characterizing and predicting the thermal, electrical, magnetic, and optical properties of crystalline metals and semiconductors [1]. Angle-resolved photoemission spectroscopy (ARPES) is the only technique directly probing the Fermi surface by measuring the Fermi momenta (kF) from energy and angular distribution of photoelectrons dislodged by monochromatic light [2]. Existing electron analyzers are able to determine a number of kF-vectors simultaneously, but current technical limitations prohibit a direct high-resolution 3D Fermi surface mapping. As a result, no such datasets exist, strongly limiting our knowledge about the Fermi surfaces and restricting a detailed comparison with the widely available nowadays calculated 3D Fermi surfaces. Here we show that using a simpler instrumentation, based on the Fourier electron optics combined with a retardation field of the detector, it is possible to perform 3D-mapping within a very short time interval and with very high resolution. We present the first detailed experimental 3D Fermi surface recorded in the full Brillouin zone along the kz-direction as well as other experimental results featuring multiple advantages of our technique. In combination with various light sources, including synchrotron radiation, our methodology and instrumentation offer new opportunities for high-resolution ARPES in the physical and life sciences. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2105.15055v1-abstract-full').style.display = 'none'; document.getElementById('2105.15055v1-abstract-short').style.display = 'inline';">△ Less</a> </span> </p> <p class="is-size-7"><span class="has-text-black-bis has-text-weight-semibold">Submitted</span> 31 May, 2021; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> May 2021. </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Comments:</span> <span class="has-text-grey-dark mathjax">14 pages, 4 figures</span> </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Journal ref:</span> Nat Commun 13, 4132 (2022) </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/2003.07712">arXiv:2003.07712</a> <span> [<a href="https://arxiv.org/pdf/2003.07712">pdf</a>] </span> </p> <div class="tags is-inline-block"> <span class="tag is-small is-link tooltip is-tooltip-top" data-tooltip="Materials Science">cond-mat.mtrl-sci</span> <span class="tag is-small is-grey tooltip is-tooltip-top" data-tooltip="Strongly Correlated Electrons">cond-mat.str-el</span> </div> <div class="is-inline-block" style="margin-left: 0.5rem"> <div class="tags has-addons"> <span class="tag is-dark is-size-7">doi</span> <span class="tag is-light is-size-7"><a class="" href="https://doi.org/10.1038/s41467-020-15865-x">10.1038/s41467-020-15865-x <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> Observation of giant spin-split Fermi-arc with maximal Chern number in the chiral topological semimetal PtGa </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/cond-mat?searchtype=author&query=Yao%2C+M">Mengyu Yao</a>, <a href="/search/cond-mat?searchtype=author&query=Manna%2C+K">Kaustuv Manna</a>, <a href="/search/cond-mat?searchtype=author&query=Yang%2C+Q">Qun Yang</a>, <a href="/search/cond-mat?searchtype=author&query=Fedorov%2C+A">Alexander Fedorov</a>, <a href="/search/cond-mat?searchtype=author&query=Voroshnin%2C+V">Vladimir Voroshnin</a>, <a href="/search/cond-mat?searchtype=author&query=Schwarze%2C+B+V">B. Valentin Schwarze</a>, <a href="/search/cond-mat?searchtype=author&query=Hornung%2C+J">Jacob Hornung</a>, <a href="/search/cond-mat?searchtype=author&query=Chattopadhyay%2C+S">S. Chattopadhyay</a>, <a href="/search/cond-mat?searchtype=author&query=Sun%2C+Z">Zhe Sun</a>, <a href="/search/cond-mat?searchtype=author&query=Guin%2C+S+N">Satya N Guin</a>, <a href="/search/cond-mat?searchtype=author&query=Wosnitza%2C+J">Jochen Wosnitza</a>, <a href="/search/cond-mat?searchtype=author&query=Borrmann%2C+H">Horst Borrmann</a>, <a href="/search/cond-mat?searchtype=author&query=Shekhar%2C+C">Chandra Shekhar</a>, <a href="/search/cond-mat?searchtype=author&query=Kumar%2C+N">Nitesh Kumar</a>, <a href="/search/cond-mat?searchtype=author&query=Fink%2C+J">J枚rg Fink</a>, <a href="/search/cond-mat?searchtype=author&query=Sun%2C+Y">Yan Sun</a>, <a href="/search/cond-mat?searchtype=author&query=Felser%2C+C">Claudia Felser</a> </p> <p class="abstract mathjax"> <span class="has-text-black-bis has-text-weight-semibold">Abstract</span>: <span class="abstract-short has-text-grey-dark mathjax" id="2003.07712v1-abstract-short" style="display: inline;"> Non-symmorphic chiral topological crystals host exotic multifold fermions, and their associated Fermi arcs helically wrap around and expand throughout the Brillouin zone between the high-symmetry center and surface-corner momenta. However, Fermi-arc splitting and realization of the theoretically proposed maximal Chern number rely heavily on the spin-orbit coupling (SOC) strength. In the present wo… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2003.07712v1-abstract-full').style.display = 'inline'; document.getElementById('2003.07712v1-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="2003.07712v1-abstract-full" style="display: none;"> Non-symmorphic chiral topological crystals host exotic multifold fermions, and their associated Fermi arcs helically wrap around and expand throughout the Brillouin zone between the high-symmetry center and surface-corner momenta. However, Fermi-arc splitting and realization of the theoretically proposed maximal Chern number rely heavily on the spin-orbit coupling (SOC) strength. In the present work, we investigate the topological states of a new chiral crystal, PtGa, which has the strongest SOC among all chiral crystals reported to date. With a comprehensive investigation using high-resolution angle-resolved photoemission spectroscopy, quantum-oscillation measurements, and state-of-the-art ab initio calculations, we report a giant SOC-induced splitting of both Fermi arcs and bulk states. Consequently, this study experimentally confirms the realization of a maximal Chern number equal to |4| for the first time in multifold fermionic systems, thereby providing a platform to observe large-quantized photogalvanic currents in optical experiments. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2003.07712v1-abstract-full').style.display = 'none'; document.getElementById('2003.07712v1-abstract-short').style.display = 'inline';">△ Less</a> </span> </p> <p class="is-size-7"><span class="has-text-black-bis has-text-weight-semibold">Submitted</span> 17 March, 2020; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> March 2020. </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Comments:</span> <span class="has-text-grey-dark mathjax">Accepted in Nature Communications</span> </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Journal ref:</span> Nature Communications, volume 11, Article number: 2033 (2020) </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/1910.11653">arXiv:1910.11653</a> <span> [<a href="https://arxiv.org/pdf/1910.11653">pdf</a>, <a href="https://arxiv.org/format/1910.11653">other</a>] </span> </p> <div class="tags is-inline-block"> <span class="tag is-small is-link tooltip is-tooltip-top" data-tooltip="Materials Science">cond-mat.mtrl-sci</span> </div> <div class="is-inline-block" style="margin-left: 0.5rem"> <div class="tags has-addons"> <span class="tag is-dark is-size-7">doi</span> <span class="tag is-light is-size-7"><a class="" href="https://doi.org/10.1038/s41535-020-00255-9">10.1038/s41535-020-00255-9 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> Variety of magnetic topological phases in the (MnBi$_2$Te$_4$)(Bi$_2$Te$_3$)$_m$ family </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/cond-mat?searchtype=author&query=Klimovskikh%2C+I+I">I. I. Klimovskikh</a>, <a href="/search/cond-mat?searchtype=author&query=Otrokov%2C+M+M">M. M. Otrokov</a>, <a href="/search/cond-mat?searchtype=author&query=Estyunin%2C+D">D. Estyunin</a>, <a href="/search/cond-mat?searchtype=author&query=Eremeev%2C+S+V">S. V. Eremeev</a>, <a href="/search/cond-mat?searchtype=author&query=Filnov%2C+S+O">S. O. Filnov</a>, <a href="/search/cond-mat?searchtype=author&query=Koroleva%2C+A">A. Koroleva</a>, <a href="/search/cond-mat?searchtype=author&query=Shevchenko%2C+E">E. Shevchenko</a>, <a href="/search/cond-mat?searchtype=author&query=Voroshnin%2C+V">V. Voroshnin</a>, <a href="/search/cond-mat?searchtype=author&query=Rusinov%2C+I+P">I. P. Rusinov</a>, <a href="/search/cond-mat?searchtype=author&query=Blanco-Rey%2C+M">M. Blanco-Rey</a>, <a href="/search/cond-mat?searchtype=author&query=Hoffmann%2C+M">M. Hoffmann</a>, <a href="/search/cond-mat?searchtype=author&query=Aliev%2C+Z+S">Z. S. Aliev</a>, <a href="/search/cond-mat?searchtype=author&query=Babanly%2C+M+B">M. B. Babanly</a>, <a href="/search/cond-mat?searchtype=author&query=Amiraslanov%2C+I+R">I. R. Amiraslanov</a>, <a href="/search/cond-mat?searchtype=author&query=Abdullayev%2C+N+A">N. A. Abdullayev</a>, <a href="/search/cond-mat?searchtype=author&query=Zverev%2C+V+N">V. N. Zverev</a>, <a href="/search/cond-mat?searchtype=author&query=Kimura%2C+A">A. Kimura</a>, <a href="/search/cond-mat?searchtype=author&query=Tereshchenko%2C+O+E">O. E. Tereshchenko</a>, <a href="/search/cond-mat?searchtype=author&query=Kokh%2C+K+A">K. A. Kokh</a>, <a href="/search/cond-mat?searchtype=author&query=Petaccia%2C+L">L. Petaccia</a>, <a href="/search/cond-mat?searchtype=author&query=Di+Santo%2C+G">G. Di Santo</a>, <a href="/search/cond-mat?searchtype=author&query=Ernst%2C+A">A. Ernst</a>, <a href="/search/cond-mat?searchtype=author&query=Echenique%2C+P+M">P. M. Echenique</a>, <a href="/search/cond-mat?searchtype=author&query=Mamedov%2C+N+T">N. T. Mamedov</a>, <a href="/search/cond-mat?searchtype=author&query=Shikin%2C+A+M">A. M. Shikin</a> , et al. (1 additional authors not shown) </p> <p class="abstract mathjax"> <span class="has-text-black-bis has-text-weight-semibold">Abstract</span>: <span class="abstract-short has-text-grey-dark mathjax" id="1910.11653v1-abstract-short" style="display: inline;"> Quantum states of matter combining non-trivial topology and magnetism attract a lot of attention nowadays; the special focus is on magnetic topological insulators (MTIs) featuring quantum anomalous Hall and axion insulator phases. Feasibility of many novel phenomena that \emph{intrinsic} magnetic TIs may host depends crucially on our ability to engineer and efficiently tune their electronic and ma… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1910.11653v1-abstract-full').style.display = 'inline'; document.getElementById('1910.11653v1-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="1910.11653v1-abstract-full" style="display: none;"> Quantum states of matter combining non-trivial topology and magnetism attract a lot of attention nowadays; the special focus is on magnetic topological insulators (MTIs) featuring quantum anomalous Hall and axion insulator phases. Feasibility of many novel phenomena that \emph{intrinsic} magnetic TIs may host depends crucially on our ability to engineer and efficiently tune their electronic and magnetic structures. Here, using angle- and spin-resolved photoemission spectroscopy along with \emph{ab initio} calculations we report on a large family of intrinsic magnetic TIs in the homologous series of the van der Waals compounds (MnBi$_2$Te$_4$)(Bi$_2$Te$_3$)$_m$ with $m=0, ..., 6$. Magnetic, electronic and, consequently, topological properties of these materials depend strongly on the $m$ value and are thus highly tunable. The antiferromagnetic (AFM) coupling between the neighboring Mn layers strongly weakens on moving from MnBi2Te4 (m=0) to MnBi4Te7 (m=1), changes to ferromagnetic (FM) one in MnBi6Te10 (m=2) and disappears with further increase in m. In this way, the AFM and FM TI states are respectively realized in the $m=0,1$ and $m=2$ cases, while for $m \ge 3$ a novel and hitherto-unknown topologically-nontrivial phase arises, in which below the corresponding critical temperature the magnetizations of the non-interacting 2D ferromagnets, formed by the \MBT\, building blocks, are disordered along the third direction. The variety of intrinsic magnetic TI phases in (MnBi$_2$Te$_4$)(Bi$_2$Te$_3$)$_m$ allows efficient engineering of functional van der Waals heterostructures for topological quantum computation, as well as antiferromagnetic and 2D spintronics. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1910.11653v1-abstract-full').style.display = 'none'; document.getElementById('1910.11653v1-abstract-short').style.display = 'inline';">△ Less</a> </span> </p> <p class="is-size-7"><span class="has-text-black-bis has-text-weight-semibold">Submitted</span> 25 October, 2019; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> October 2019. </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Journal ref:</span> npj Quantum Mater. 5, 54 (2020) </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/1909.10806">arXiv:1909.10806</a> <span> [<a href="https://arxiv.org/pdf/1909.10806">pdf</a>, <a href="https://arxiv.org/format/1909.10806">other</a>] </span> </p> <div class="tags is-inline-block"> <span class="tag is-small is-link tooltip is-tooltip-top" data-tooltip="Superconductivity">cond-mat.supr-con</span> </div> <div class="is-inline-block" style="margin-left: 0.5rem"> <div class="tags has-addons"> <span class="tag is-dark is-size-7">doi</span> <span class="tag is-light is-size-7"><a class="" href="https://doi.org/10.1038/s41535-020-00268-4">10.1038/s41535-020-00268-4 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> Strongly correlated superconductor with polytypic 3D Dirac points </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/cond-mat?searchtype=author&query=Borisenko%2C+S">Sergey Borisenko</a>, <a href="/search/cond-mat?searchtype=author&query=Bezguba%2C+V">Volodymyr Bezguba</a>, <a href="/search/cond-mat?searchtype=author&query=Fedorov%2C+A">Alexander Fedorov</a>, <a href="/search/cond-mat?searchtype=author&query=Kushnirenko%2C+Y">Yevhen Kushnirenko</a>, <a href="/search/cond-mat?searchtype=author&query=Voroshnin%2C+V">Vladimir Voroshnin</a>, <a href="/search/cond-mat?searchtype=author&query=Sturza%2C+M">Mihai Sturza</a>, <a href="/search/cond-mat?searchtype=author&query=Aswartham%2C+S">Saicharan Aswartham</a>, <a href="/search/cond-mat?searchtype=author&query=Yaresko%2C+A">Alexander Yaresko</a> </p> <p class="abstract mathjax"> <span class="has-text-black-bis has-text-weight-semibold">Abstract</span>: <span class="abstract-short has-text-grey-dark mathjax" id="1909.10806v2-abstract-short" style="display: inline;"> Topological superconductors should be able to provide essential ingredients for quantum computing, but are very challenging to realize. Spin-orbit interaction in iron-based superconductors opens the energy gap between the $p$-states of pnictogen and $d$-states of iron very close to the Fermi level, and such $p$-states have been recently experimentally detected. Density functional theory predicts e… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1909.10806v2-abstract-full').style.display = 'inline'; document.getElementById('1909.10806v2-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="1909.10806v2-abstract-full" style="display: none;"> Topological superconductors should be able to provide essential ingredients for quantum computing, but are very challenging to realize. Spin-orbit interaction in iron-based superconductors opens the energy gap between the $p$-states of pnictogen and $d$-states of iron very close to the Fermi level, and such $p$-states have been recently experimentally detected. Density functional theory predicts existence of topological surface states within this gap in FeTe$_{1-x}$Se$_x$ making it an attractive candidate material. Here we use synchrotron-based angle-resolved photoemission spectroscopy and band structure calculations to demonstrate that FeTe$_{1-x}$Se$_x$ (x=0.45) is a superconducting 3D Dirac semimetal hosting type-I and type-II Dirac points and that its electronic structure remains topologically trivial. We show that the inverted band gap in FeTe$_{1-x}$Se$_x$ can possibly be realized by further increase of Te content, but strong correlations reduce it to a sub-meV size, making the experimental detection of this gap and corresponding topological surface states very challenging, not to mention exact matching with the Fermi level. On the other hand, the $p-d$ and $d-d$ interactions are responsible for the formation of extremely flat band at the Fermi level pointing to its intimate relation with the mechanism of high-T$_c$ superconductivity in IBS. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1909.10806v2-abstract-full').style.display = 'none'; document.getElementById('1909.10806v2-abstract-short').style.display = 'inline';">△ Less</a> </span> </p> <p class="is-size-7"><span class="has-text-black-bis has-text-weight-semibold">Submitted</span> 28 September, 2019; <span class="has-text-black-bis has-text-weight-semibold">v1</span> submitted 24 September, 2019; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> September 2019. </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Comments:</span> <span class="has-text-grey-dark mathjax">10 pages, 5 figures, 28 references</span> </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Journal ref:</span> npj Quantum Materials volume 5, Article number: 67 (2020) </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/1809.01886">arXiv:1809.01886</a> <span> [<a href="https://arxiv.org/pdf/1809.01886">pdf</a>, <a href="https://arxiv.org/format/1809.01886">other</a>] </span> </p> <div class="tags is-inline-block"> <span class="tag is-small is-link tooltip is-tooltip-top" data-tooltip="Mesoscale and Nanoscale Physics">cond-mat.mes-hall</span> <span class="tag is-small is-grey tooltip is-tooltip-top" data-tooltip="Materials Science">cond-mat.mtrl-sci</span> </div> <div class="is-inline-block" style="margin-left: 0.5rem"> <div class="tags has-addons"> <span class="tag is-dark is-size-7">doi</span> <span class="tag is-light is-size-7"><a class="" href="https://doi.org/10.1088/2053-1583/aaebd3">10.1088/2053-1583/aaebd3 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> Narrow photoluminescence peak of epitaxial MoS$_2$ on graphene/Ir(111) </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/cond-mat?searchtype=author&query=Ehlen%2C+N">Niels Ehlen</a>, <a href="/search/cond-mat?searchtype=author&query=Hall%2C+J">Joshua Hall</a>, <a href="/search/cond-mat?searchtype=author&query=Senkovskiy%2C+B+V">Boris V. Senkovskiy</a>, <a href="/search/cond-mat?searchtype=author&query=Hell%2C+M">Martin Hell</a>, <a href="/search/cond-mat?searchtype=author&query=Li%2C+J">Jun Li</a>, <a href="/search/cond-mat?searchtype=author&query=Herman%2C+d+A">d Alexander Herman</a>, <a href="/search/cond-mat?searchtype=author&query=Smirnov%2C+D">Dmitry Smirnov</a>, <a href="/search/cond-mat?searchtype=author&query=Fedorov%2C+A">Alexander Fedorov</a>, <a href="/search/cond-mat?searchtype=author&query=Voroshnin%2C+V+Y">Vladimir Yu. Voroshnin</a>, <a href="/search/cond-mat?searchtype=author&query=di+Santo%2C+G">Giovanni di Santo</a>, <a href="/search/cond-mat?searchtype=author&query=Petaccia%2C+L">Luca Petaccia</a>, <a href="/search/cond-mat?searchtype=author&query=Michely%2C+T">Thomas Michely</a>, <a href="/search/cond-mat?searchtype=author&query=Gr%C3%BCneis%2C+A">Alexander Gr眉neis</a> </p> <p class="abstract mathjax"> <span class="has-text-black-bis has-text-weight-semibold">Abstract</span>: <span class="abstract-short has-text-grey-dark mathjax" id="1809.01886v1-abstract-short" style="display: inline;"> We report on the observation of photoluminescence (PL) with a narrow 18 meV peak width from molecular beam epitaxy grown MoS$_2$ on graphene/Ir(111). This observation is explained in terms of a weak graphene-MoS$_2$ interaction that prevents PL quenching expected for a metallic substrate. The weak interaction of MoS$_2$ with the graphene is highlighted by angle-resolved photoemission spectroscopy… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1809.01886v1-abstract-full').style.display = 'inline'; document.getElementById('1809.01886v1-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="1809.01886v1-abstract-full" style="display: none;"> We report on the observation of photoluminescence (PL) with a narrow 18 meV peak width from molecular beam epitaxy grown MoS$_2$ on graphene/Ir(111). This observation is explained in terms of a weak graphene-MoS$_2$ interaction that prevents PL quenching expected for a metallic substrate. The weak interaction of MoS$_2$ with the graphene is highlighted by angle-resolved photoemission spectroscopy and temperature dependent Raman spectroscopy. These methods reveal that there is no hybridization between electronic states of graphene and MoS$_2$ and a different thermal expansion of graphene and MoS$_2$. Molecular beam epitaxy grown MoS2 on graphene is therefore an important platform for optoelectronics which allows for large area growth with controlled properties. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1809.01886v1-abstract-full').style.display = 'none'; document.getElementById('1809.01886v1-abstract-short').style.display = 'inline';">△ Less</a> </span> </p> <p class="is-size-7"><span class="has-text-black-bis has-text-weight-semibold">Submitted</span> 6 September, 2018; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> September 2018. </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Comments:</span> <span class="has-text-grey-dark mathjax">18 pages, 5 figures, submitted for review</span> </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/1707.08798">arXiv:1707.08798</a> <span> [<a href="https://arxiv.org/pdf/1707.08798">pdf</a>, <a href="https://arxiv.org/format/1707.08798">other</a>] </span> </p> <div class="tags is-inline-block"> <span class="tag is-small is-link tooltip is-tooltip-top" data-tooltip="Materials Science">cond-mat.mtrl-sci</span> </div> <div class="is-inline-block" style="margin-left: 0.5rem"> <div class="tags has-addons"> <span class="tag is-dark is-size-7">doi</span> <span class="tag is-light is-size-7"><a class="" href="https://doi.org/10.1103/PhysRevB.97.245407">10.1103/PhysRevB.97.245407 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> Synchrotron radiation induced magnetization in magnetically-doped and pristine topological insulators </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/cond-mat?searchtype=author&query=Shikin%2C+A+M">A. M. Shikin</a>, <a href="/search/cond-mat?searchtype=author&query=Sostina%2C+D+M">D. M. Sostina</a>, <a href="/search/cond-mat?searchtype=author&query=Rybkina%2C+A+A">A. A. Rybkina</a>, <a href="/search/cond-mat?searchtype=author&query=Voroshnin%2C+V+Y">V. Yu. Voroshnin</a>, <a href="/search/cond-mat?searchtype=author&query=Klimovskikh%2C+I+I">I. I. Klimovskikh</a>, <a href="/search/cond-mat?searchtype=author&query=Rybkin%2C+A+G">A. G. Rybkin</a>, <a href="/search/cond-mat?searchtype=author&query=Estyunin%2C+D+A">D. A. Estyunin</a>, <a href="/search/cond-mat?searchtype=author&query=Kokh%2C+K+A">K. A. Kokh</a>, <a href="/search/cond-mat?searchtype=author&query=Tereshchenko%2C+O+E">O. E. Tereshchenko</a>, <a href="/search/cond-mat?searchtype=author&query=Petaccia%2C+L">L. Petaccia</a>, <a href="/search/cond-mat?searchtype=author&query=Di+Santo%2C+G">G. Di Santo</a>, <a href="/search/cond-mat?searchtype=author&query=Skirdkov%2C+P+N">P. N. Skirdkov</a>, <a href="/search/cond-mat?searchtype=author&query=Zvezdin%2C+K+A">K. A. Zvezdin</a>, <a href="/search/cond-mat?searchtype=author&query=Zvezdin%2C+A+K">A. K. Zvezdin</a>, <a href="/search/cond-mat?searchtype=author&query=Kimura%2C+A">A. Kimura</a>, <a href="/search/cond-mat?searchtype=author&query=Chulkov%2C+E+V">E. V. Chulkov</a>, <a href="/search/cond-mat?searchtype=author&query=Krasovskii%2C+E+E">E. E. Krasovskii</a> </p> <p class="abstract mathjax"> <span class="has-text-black-bis has-text-weight-semibold">Abstract</span>: <span class="abstract-short has-text-grey-dark mathjax" id="1707.08798v1-abstract-short" style="display: inline;"> Quantum mechanics postulates that any measurement influences the state of the investigated system. Here, by means of angle-, spin-, and time-resolved photoemission experiments and ab initio calculations we demonstrate how non-equal depopulation of the Dirac cone (DC) states with opposite momenta in V-doped and pristine topological insulators (TIs) created by a photoexcitation by linearly polarized… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1707.08798v1-abstract-full').style.display = 'inline'; document.getElementById('1707.08798v1-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="1707.08798v1-abstract-full" style="display: none;"> Quantum mechanics postulates that any measurement influences the state of the investigated system. Here, by means of angle-, spin-, and time-resolved photoemission experiments and ab initio calculations we demonstrate how non-equal depopulation of the Dirac cone (DC) states with opposite momenta in V-doped and pristine topological insulators (TIs) created by a photoexcitation by linearly polarized synchrotron radiation (SR) is followed by the hole-generated uncompensated spin accumulation and the SR-induced magnetization via the spin-torque effect. We show that the photoexcitation of the DC is asymmetric, that it varies with the photon energy, and that it practically does not change during the relaxation. We find a relation between the photoexcitation asymmetry, the generated spin accumulation and the induced spin polarization of the DC and V 3d states. Experimentally the SR-generated in-plane and out-of-plane magnetization is confirmed by the $k_{\parallel}$-shift of the DC position and by the splitting of the states at the Dirac point even above the Curie temperature. Theoretical predictions and estimations of the measurable physical quantities substantiate the experimental results. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1707.08798v1-abstract-full').style.display = 'none'; document.getElementById('1707.08798v1-abstract-short').style.display = 'inline';">△ Less</a> </span> </p> <p class="is-size-7"><span class="has-text-black-bis has-text-weight-semibold">Submitted</span> 27 July, 2017; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> July 2017. </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Comments:</span> <span class="has-text-grey-dark mathjax">17 pages, 8 figures</span> </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Journal ref:</span> Phys. Rev. B 97, 245407 (2018) </p> </li> </ol> <div class="is-hidden-tablet">  <span class="help" style="display: inline-block;"><a href="https://github.com/arXiv/arxiv-search/releases">Search v0.5.6 released 2020-02-24</a>  </span> </div> </div> </main> <footer> <div class="columns is-desktop" role="navigation" aria-label="Secondary">  <div class="column"> <div class="columns"> <div class="column"> <ul class="nav-spaced"> <li><a href="https://info.arxiv.org/about">About</a></li> <li><a href="https://info.arxiv.org/help">Help</a></li> </ul> </div> <div class="column"> <ul class="nav-spaced"> <li> <svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 512 512" class="icon filter-black" role="presentation"><title>contact arXiv</title><desc>Click here to contact arXiv</desc><path d="M502.3 190.8c3.9-3.1 9.7-.2 9.7 4.7V400c0 26.5-21.5 48-48 48H48c-26.5 0-48-21.5-48-48V195.6c0-5 5.7-7.8 9.7-4.7 22.4 17.4 52.1 39.5 154.1 113.6 21.1 15.4 56.7 47.8 92.2 47.6 35.7.3 72-32.8 92.3-47.6 102-74.1 131.6-96.3 154-113.7zM256 320c23.2.4 56.6-29.2 73.4-41.4 132.7-96.3 142.8-104.7 173.4-128.7 5.8-4.5 9.2-11.5 9.2-18.9v-19c0-26.5-21.5-48-48-48H48C21.5 64 0 85.5 0 112v19c0 7.4 3.4 14.3 9.2 18.9 30.6 23.9 40.7 32.4 173.4 128.7 16.8 12.2 50.2 41.8 73.4 41.4z"/></svg> <a href="https://info.arxiv.org/help/contact.html"> Contact</a> </li> <li> <svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 512 512" class="icon filter-black" role="presentation"><title>subscribe to arXiv mailings</title><desc>Click here to subscribe</desc><path d="M476 3.2L12.5 270.6c-18.1 10.4-15.8 35.6 2.2 43.2L121 358.4l287.3-253.2c5.5-4.9 13.3 2.6 8.6 8.3L176 407v80.5c0 23.6 28.5 32.9 42.5 15.8L282 426l124.6 52.2c14.2 6 30.4-2.9 33-18.2l72-432C515 7.8 493.3-6.8 476 3.2z"/></svg> <a href="https://info.arxiv.org/help/subscribe"> Subscribe</a> </li> </ul> </div> </div> </div>   <div class="column"> <div class="columns"> <div class="column"> <ul class="nav-spaced"> <li><a href="https://info.arxiv.org/help/license/index.html">Copyright</a></li> <li><a href="https://info.arxiv.org/help/policies/privacy_policy.html">Privacy Policy</a></li> </ul> </div> <div class="column sorry-app-links"> <ul class="nav-spaced"> <li><a href="https://info.arxiv.org/help/web_accessibility.html">Web Accessibility Assistance</a></li> <li> <p class="help"> <a class="a11y-main-link" href="https://status.arxiv.org" target="_blank">arXiv Operational Status <svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 256 512" class="icon filter-dark_grey" role="presentation"><path d="M224.3 273l-136 136c-9.4 9.4-24.6 9.4-33.9 0l-22.6-22.6c-9.4-9.4-9.4-24.6 0-33.9l96.4-96.4-96.4-96.4c-9.4-9.4-9.4-24.6 0-33.9L54.3 103c9.4-9.4 24.6-9.4 33.9 0l136 136c9.5 9.4 9.5 24.6.1 34z"/></svg></a><br> Get status notifications via <a class="is-link" href="https://subscribe.sorryapp.com/24846f03/email/new" target="_blank"><svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 512 512" class="icon filter-black" role="presentation"><path d="M502.3 190.8c3.9-3.1 9.7-.2 9.7 4.7V400c0 26.5-21.5 48-48 48H48c-26.5 0-48-21.5-48-48V195.6c0-5 5.7-7.8 9.7-4.7 22.4 17.4 52.1 39.5 154.1 113.6 21.1 15.4 56.7 47.8 92.2 47.6 35.7.3 72-32.8 92.3-47.6 102-74.1 131.6-96.3 154-113.7zM256 320c23.2.4 56.6-29.2 73.4-41.4 132.7-96.3 142.8-104.7 173.4-128.7 5.8-4.5 9.2-11.5 9.2-18.9v-19c0-26.5-21.5-48-48-48H48C21.5 64 0 85.5 0 112v19c0 7.4 3.4 14.3 9.2 18.9 30.6 23.9 40.7 32.4 173.4 128.7 16.8 12.2 50.2 41.8 73.4 41.4z"/></svg>email</a> or <a class="is-link" href="https://subscribe.sorryapp.com/24846f03/slack/new" target="_blank"><svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 448 512" class="icon filter-black" role="presentation"><path d="M94.12 315.1c0 25.9-21.16 47.06-47.06 47.06S0 341 0 315.1c0-25.9 21.16-47.06 47.06-47.06h47.06v47.06zm23.72 0c0-25.9 21.16-47.06 47.06-47.06s47.06 21.16 47.06 47.06v117.84c0 25.9-21.16 47.06-47.06 47.06s-47.06-21.16-47.06-47.06V315.1zm47.06-188.98c-25.9 0-47.06-21.16-47.06-47.06S139 32 164.9 32s47.06 21.16 47.06 47.06v47.06H164.9zm0 23.72c25.9 0 47.06 21.16 47.06 47.06s-21.16 47.06-47.06 47.06H47.06C21.16 243.96 0 222.8 0 196.9s21.16-47.06 47.06-47.06H164.9zm188.98 47.06c0-25.9 21.16-47.06 47.06-47.06 25.9 0 47.06 21.16 47.06 47.06s-21.16 47.06-47.06 47.06h-47.06V196.9zm-23.72 0c0 25.9-21.16 47.06-47.06 47.06-25.9 0-47.06-21.16-47.06-47.06V79.06c0-25.9 21.16-47.06 47.06-47.06 25.9 0 47.06 21.16 47.06 47.06V196.9zM283.1 385.88c25.9 0 47.06 21.16 47.06 47.06 0 25.9-21.16 47.06-47.06 47.06-25.9 0-47.06-21.16-47.06-47.06v-47.06h47.06zm0-23.72c-25.9 0-47.06-21.16-47.06-47.06 0-25.9 21.16-47.06 47.06-47.06h117.84c25.9 0 47.06 21.16 47.06 47.06 0 25.9-21.16 47.06-47.06 47.06H283.1z"/></svg>slack</a> </p> </li> </ul> </div> </div> </div>  </div> </footer> <script src="https://static.arxiv.org/static/base/1.0.0a5/js/member_acknowledgement.js"></script> </body> </html>

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