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<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/1910.07830">arXiv:1910.07830</a> <span> [<a href="https://arxiv.org/pdf/1910.07830">pdf</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="Atomic and Molecular Clusters">physics.atm-clus</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/10.1016/j.carbon.2018.09.035">10.1016/j.carbon.2018.09.035 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> Investigation of the surface properties of different highly aligned N-MWCNT carpets </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/cond-mat?searchtype=author&query=Eckert%2C+V">V. Eckert</a>, <a href="/search/cond-mat?searchtype=author&query=Haubold%2C+E">E. Haubold</a>, <a href="/search/cond-mat?searchtype=author&query=Oswald%2C+S">S. Oswald</a>, <a href="/search/cond-mat?searchtype=author&query=Michel%2C+S">S. Michel</a>, <a href="/search/cond-mat?searchtype=author&query=Bellmann%2C+C">C. Bellmann</a>, <a href="/search/cond-mat?searchtype=author&query=Potapov%2C+P">P. Potapov</a>, <a href="/search/cond-mat?searchtype=author&query=Wolf%2C+D">D. Wolf</a>, <a href="/search/cond-mat?searchtype=author&query=Hampel%2C+S">S. Hampel</a>, <a href="/search/cond-mat?searchtype=author&query=B%C3%BCchner%2C+B">B. B眉chner</a>, <a href="/search/cond-mat?searchtype=author&query=Mertig%2C+M">M. Mertig</a>, <a href="/search/cond-mat?searchtype=author&query=Leonhardt%2C+A">A. Leonhardt</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="1910.07830v1-abstract-short" style="display: inline;"> We investigated the physicochemical surface properties of different highly aligned nitrogen-doped multi-walled carbon nanotube (N-MWCNT) carpets, synthesized using toluene/pyrazine, toluene/benzylamine and acetonitrile via a sublimation-based chemical vapor deposition (SCVD) method at 760掳C. The surfaces of the N-MWCNT carpets synthesized using toluene/pyrazine and toluene/benzylamine were very hy… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1910.07830v1-abstract-full').style.display = 'inline'; document.getElementById('1910.07830v1-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="1910.07830v1-abstract-full" style="display: none;"> We investigated the physicochemical surface properties of different highly aligned nitrogen-doped multi-walled carbon nanotube (N-MWCNT) carpets, synthesized using toluene/pyrazine, toluene/benzylamine and acetonitrile via a sublimation-based chemical vapor deposition (SCVD) method at 760掳C. The surfaces of the N-MWCNT carpets synthesized using toluene/pyrazine and toluene/benzylamine were very hydrophobic. In contrast, we observed a complete wetting of the N-MWCNT carpets synthesized using acetonitrile. The difference in the wetting behavior of these N-MWCNT carpets is the main focus in this study and was not investigated before. Here, we show that not only the presence or concentration of nitrogen inside the carbon lattice, but especially it's kind of incorporation have an important influence on the surface polarity. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1910.07830v1-abstract-full').style.display = 'none'; document.getElementById('1910.07830v1-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 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">Comments:</span> <span class="has-text-grey-dark mathjax">preprint, 19 pages, 4 Figures</span> </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Journal ref:</span> Carbon 141 (2019) 99-106 </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/1812.01668">arXiv:1812.01668</a> <span> [<a href="https://arxiv.org/pdf/1812.01668">pdf</a>, <a href="https://arxiv.org/format/1812.01668">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/10.1063/1.5124563">10.1063/1.5124563 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> Possible Experimental Realization of a Basic Z2 Topological Semimetal </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/cond-mat?searchtype=author&query=Haubold%2C+E">Erik Haubold</a>, <a href="/search/cond-mat?searchtype=author&query=Fedorov%2C+A">Alexander Fedorov</a>, <a href="/search/cond-mat?searchtype=author&query=Rusinov%2C+I+P">Igor P. Rusinov</a>, <a href="/search/cond-mat?searchtype=author&query=Menshchikova%2C+T+V">Tatiana V. Menshchikova</a>, <a href="/search/cond-mat?searchtype=author&query=Duppel%2C+V">Viola Duppel</a>, <a href="/search/cond-mat?searchtype=author&query=Friedrich%2C+D">Daniel Friedrich</a>, <a href="/search/cond-mat?searchtype=author&query=Pielnhofer%2C+F">Florian Pielnhofer</a>, <a href="/search/cond-mat?searchtype=author&query=Weihrich%2C+R">Richard Weihrich</a>, <a href="/search/cond-mat?searchtype=author&query=Pfitzner%2C+A">Arno Pfitzner</a>, <a href="/search/cond-mat?searchtype=author&query=Zeugner%2C+A">Alexander Zeugner</a>, <a href="/search/cond-mat?searchtype=author&query=Isaeva%2C+A">Anna Isaeva</a>, <a href="/search/cond-mat?searchtype=author&query=Thirupathaiah%2C+S">Setti Thirupathaiah</a>, <a href="/search/cond-mat?searchtype=author&query=Kushnirenko%2C+Y">Yevhen Kushnirenko</a>, <a href="/search/cond-mat?searchtype=author&query=Rienks%2C+E">Emile Rienks</a>, <a href="/search/cond-mat?searchtype=author&query=Kim%2C+T">Timur Kim</a>, <a href="/search/cond-mat?searchtype=author&query=Chulkov%2C+E+V">Evgueni V. Chulkov</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+V">Sergey V. 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="1812.01668v1-abstract-short" style="display: inline;"> We report experimental and theoretical evidence that GaGeTe is a basic $Z_2$ topological semimetal with three types of charge carriers: bulk-originated electrons and holes as well as surface state electrons. This electronic situation is qualitatively similar to the primer 3D topological insulator Bi2Se3, but important differences account for an unprecedented transport scenario in GaGeTe. High-reso… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1812.01668v1-abstract-full').style.display = 'inline'; document.getElementById('1812.01668v1-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="1812.01668v1-abstract-full" style="display: none;"> We report experimental and theoretical evidence that GaGeTe is a basic $Z_2$ topological semimetal with three types of charge carriers: bulk-originated electrons and holes as well as surface state electrons. This electronic situation is qualitatively similar to the primer 3D topological insulator Bi2Se3, but important differences account for an unprecedented transport scenario in GaGeTe. High-resolution angle-resolved photoemission spectroscopy combined with advanced band structure calculations show a small indirect energy gap caused by a peculiar band inversion in the \textit{T}-point of the Brillouin zone in GaGeTe. An energy overlap of the valence and conduction bands brings both electron- and hole-like carriers to the Fermi level, while the momentum gap between the corresponding dispersions remains finite. We argue that peculiarities of the electronic spectrum of GaGeTe have a fundamental importance for the physics of topological matter and may boost the material's application potential. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1812.01668v1-abstract-full').style.display = 'none'; document.getElementById('1812.01668v1-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 December, 2018; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> December 2018. </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Journal ref:</span> APL Materials 7, 121106 (2019) </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/1811.02430">arXiv:1811.02430</a> <span> [<a href="https://arxiv.org/pdf/1811.02430">pdf</a>, <a href="https://arxiv.org/format/1811.02430">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/10.1103/PhysRevB.100.024517">10.1103/PhysRevB.100.024517 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> Energy scale of nematic ordering in the parent iron-based superconductor:BaFe2As2 </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/cond-mat?searchtype=author&query=Fedorov%2C+A">Alexander Fedorov</a>, <a href="/search/cond-mat?searchtype=author&query=Yaresko%2C+A">Alexander Yaresko</a>, <a href="/search/cond-mat?searchtype=author&query=Haubold%2C+E">Erik Haubold</a>, <a href="/search/cond-mat?searchtype=author&query=Kushnirenko%2C+Y">Yevhen Kushnirenko</a>, <a href="/search/cond-mat?searchtype=author&query=Kim%2C+T">Timur Kim</a>, <a href="/search/cond-mat?searchtype=author&query=Buechner%2C+B">Bernd Buechner</a>, <a href="/search/cond-mat?searchtype=author&query=Aswartham%2C+S">Saicharan Aswartham</a>, <a href="/search/cond-mat?searchtype=author&query=Wurmehl%2C+S">Sabine Wurmehl</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="1811.02430v2-abstract-short" style="display: inline;"> Nematicity plays an important role in the physics of iron-based superconductors (IBS). Its microscopic origin and in particular its importance for the mechanism of high-temperature superconductivity itself are highly debated. A crucial knowledge in this regard is the degree to which the nematic order influences the electronic structure of these materials. Earlier angle-resolved photoemission spect… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1811.02430v2-abstract-full').style.display = 'inline'; document.getElementById('1811.02430v2-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="1811.02430v2-abstract-full" style="display: none;"> Nematicity plays an important role in the physics of iron-based superconductors (IBS). Its microscopic origin and in particular its importance for the mechanism of high-temperature superconductivity itself are highly debated. A crucial knowledge in this regard is the degree to which the nematic order influences the electronic structure of these materials. Earlier angle-resolved photoemission spectroscopy (ARPES) studies found that the effect is dramatic in three families of IBS including 11, 111 and 122 compounds: energy splitting reaches 70 meV and Fermi surface becomes noticeably distorted. More recent experiments, however, reported significantly lower energy scale in 11 and 111 families, thus questioning the degree and universality of the impact of nematicity on the electronic structure of IBS. Here we revisit the electronic structure of undoped parent BaFe2As2 (122 family). Our systematic ARPES study including the detailed temperature and photon energy dependencies points to the significantly smaller energy scale also in this family of materials, thus establishing the universal scale of this phenomenon in IBS. Our results form a necessary quantitative basis for theories of high-temperature superconductivity focused on the nematicity. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1811.02430v2-abstract-full').style.display = 'none'; document.getElementById('1811.02430v2-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> 7 November, 2018; <span class="has-text-black-bis has-text-weight-semibold">v1</span> submitted 6 November, 2018; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> November 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">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> Phys. Rev. B 100, 024517 (2019) </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/1808.07640">arXiv:1808.07640</a> <span> [<a href="https://arxiv.org/pdf/1808.07640">pdf</a>, <a href="https://arxiv.org/format/1808.07640">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/PhysRevMaterials.3.024202">10.1103/PhysRevMaterials.3.024202 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> Massive Dirac fermions in layered BaZnBi$_2$ </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/cond-mat?searchtype=author&query=Thirupathaiah%2C+S">S. Thirupathaiah</a>, <a href="/search/cond-mat?searchtype=author&query=Efremov%2C+D">D. Efremov</a>, <a href="/search/cond-mat?searchtype=author&query=Kushnirenko%2C+Y">Y. Kushnirenko</a>, <a href="/search/cond-mat?searchtype=author&query=Haubold%2C+E">E. Haubold</a>, <a href="/search/cond-mat?searchtype=author&query=Kim%2C+T+K">T. K. Kim</a>, <a href="/search/cond-mat?searchtype=author&query=Pienning%2C+B+R">B. R. Pienning</a>, <a href="/search/cond-mat?searchtype=author&query=Morozov%2C+I">I. Morozov</a>, <a href="/search/cond-mat?searchtype=author&query=Aswartham%2C+S">S. Aswartham</a>, <a href="/search/cond-mat?searchtype=author&query=B%C3%BCchner%2C+B">B. B眉chner</a>, <a href="/search/cond-mat?searchtype=author&query=Borisenko%2C+S+V">S. V. 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="1808.07640v1-abstract-short" style="display: inline;"> Using angle-resolved photoemission spectroscopy (ARPES) and density functional theory (DFT) we study the electronic structure of layered BaZnBi$_2$. Our experimental results show no evidence of Dirac states in BaZnBi$_2$ originated either from the bulk or the surface. The calculated band structure without spin-orbit interaction shows several linear dispersive band crossing points throughout the Br… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1808.07640v1-abstract-full').style.display = 'inline'; document.getElementById('1808.07640v1-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="1808.07640v1-abstract-full" style="display: none;"> Using angle-resolved photoemission spectroscopy (ARPES) and density functional theory (DFT) we study the electronic structure of layered BaZnBi$_2$. Our experimental results show no evidence of Dirac states in BaZnBi$_2$ originated either from the bulk or the surface. The calculated band structure without spin-orbit interaction shows several linear dispersive band crossing points throughout the Brillouin zone. However, as soon as the spin-orbit interaction is turned on, the band crossing points are significantly gapped out. The experimental observations are in good agreement with our DFT calculations. These observations suggest that the Dirac fermions in BaZnBi$_2$ are trivial and massive. We also observe experimentally that the electronic structure of BaZnBi$_2$ comprises of several linear dispersive bands in the vicinity of Fermi level dispersing to a wider range of binding energy. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1808.07640v1-abstract-full').style.display = 'none'; document.getElementById('1808.07640v1-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 August, 2018; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> August 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">7 pages, 4 figures</span> </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Journal ref:</span> Phys. Rev. Materials 3, 024202 (2019) </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/1802.08668">arXiv:1802.08668</a> <span> [<a href="https://arxiv.org/pdf/1802.08668">pdf</a>, <a href="https://arxiv.org/format/1802.08668">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/10.1103/PhysRevB.97.180501">10.1103/PhysRevB.97.180501 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> 3D superconducting gap in FeSe from ARPES </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/cond-mat?searchtype=author&query=Kushnirenko%2C+Y+S">Y. S. Kushnirenko</a>, <a href="/search/cond-mat?searchtype=author&query=Fedorov%2C+A+V">A. V. Fedorov</a>, <a href="/search/cond-mat?searchtype=author&query=Haubold%2C+E">E. Haubold</a>, <a href="/search/cond-mat?searchtype=author&query=Thirupathaiah%2C+S">S. Thirupathaiah</a>, <a href="/search/cond-mat?searchtype=author&query=Wolf%2C+T">T. Wolf</a>, <a href="/search/cond-mat?searchtype=author&query=Aswartham%2C+S">S. Aswartham</a>, <a href="/search/cond-mat?searchtype=author&query=Morozov%2C+I">I. Morozov</a>, <a href="/search/cond-mat?searchtype=author&query=Kim%2C+T+K">T. K. Kim</a>, <a href="/search/cond-mat?searchtype=author&query=B%C3%BCchner%2C+B">B. B眉chner</a>, <a href="/search/cond-mat?searchtype=author&query=Borisenko%2C+S+V">S. V. 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="1802.08668v1-abstract-short" style="display: inline;"> We present a systematic angle-resolved photoemission spectroscopy study of the superconducting gap in FeSe. The gap function is determined in a full Brillouin zone including all Fermi surfaces and kz-dependence. We find significant anisotropy of the superconducting gap in all momentum directions. While the in-plane anisotropy can be explained by both, nematicity-induced pairing anisotropy and orbi… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1802.08668v1-abstract-full').style.display = 'inline'; document.getElementById('1802.08668v1-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="1802.08668v1-abstract-full" style="display: none;"> We present a systematic angle-resolved photoemission spectroscopy study of the superconducting gap in FeSe. The gap function is determined in a full Brillouin zone including all Fermi surfaces and kz-dependence. We find significant anisotropy of the superconducting gap in all momentum directions. While the in-plane anisotropy can be explained by both, nematicity-induced pairing anisotropy and orbital-selective pairing, the kz-anisotropy requires additional refinement of theoretical approaches. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1802.08668v1-abstract-full').style.display = 'none'; document.getElementById('1802.08668v1-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 February, 2018; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> February 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">Main text: 6 pages, 4 figures; Supplemental Material: 2 pages, 1 figure</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, 180501 (2018) </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/1802.04045">arXiv:1802.04045</a> <span> [<a href="https://arxiv.org/pdf/1802.04045">pdf</a>, <a href="https://arxiv.org/format/1802.04045">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.98.085145">10.1103/PhysRevB.98.085145 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> Spectroscopic evidence of topological phase transition in 3D Dirac semimetal Cd$_3$(As$_{1-x}$P$_x$)$_2$ </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/cond-mat?searchtype=author&query=Thirupathaiah%2C+S">S. Thirupathaiah</a>, <a href="/search/cond-mat?searchtype=author&query=Morozov%2C+I">I. Morozov</a>, <a href="/search/cond-mat?searchtype=author&query=Kushnirenko%2C+Y">Y. Kushnirenko</a>, <a href="/search/cond-mat?searchtype=author&query=Fedorov%2C+A+V">A. V. Fedorov</a>, <a href="/search/cond-mat?searchtype=author&query=Haubold%2C+E">E. Haubold</a>, <a href="/search/cond-mat?searchtype=author&query=Kim%2C+T+K">T. K. Kim</a>, <a href="/search/cond-mat?searchtype=author&query=Shipunov%2C+G">G. Shipunov</a>, <a href="/search/cond-mat?searchtype=author&query=Maksutova%2C+A">A. Maksutova</a>, <a href="/search/cond-mat?searchtype=author&query=Kataeva%2C+O">O. Kataeva</a>, <a href="/search/cond-mat?searchtype=author&query=Aswartham%2C+S">S. Aswartham</a>, <a href="/search/cond-mat?searchtype=author&query=B%C3%BCchner%2C+B">B. B眉chner</a>, <a href="/search/cond-mat?searchtype=author&query=Borisenko%2C+S+V">S. V. 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="1802.04045v1-abstract-short" style="display: inline;"> We study the low-energy electronic structure of three-dimensional Dirac semimetal, Cd$_3$(As$_{1-x}$P$_x$)$_2$ [$x$ = 0 and 0.34(3)], by employing the angle-resolved photoemission spectroscopy (ARPES). We observe that the bulk Dirac states in Cd$_3$(As$_{0.66}$P$_{0.34}$)$_2$ are gapped out with an energy of 0.23 eV, contrary to the parent Cd$_3$As$_2$ in which the gapless Dirac states have been o… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1802.04045v1-abstract-full').style.display = 'inline'; document.getElementById('1802.04045v1-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="1802.04045v1-abstract-full" style="display: none;"> We study the low-energy electronic structure of three-dimensional Dirac semimetal, Cd$_3$(As$_{1-x}$P$_x$)$_2$ [$x$ = 0 and 0.34(3)], by employing the angle-resolved photoemission spectroscopy (ARPES). We observe that the bulk Dirac states in Cd$_3$(As$_{0.66}$P$_{0.34}$)$_2$ are gapped out with an energy of 0.23 eV, contrary to the parent Cd$_3$As$_2$ in which the gapless Dirac states have been observed. Thus, our results confirm the earlier predicted topological phase transition in Cd$_3$As$_2$ with perturbation. We further notice that the critical P substitution concentration, at which the two Dirac points that are spread along the $c$-axis in Cd$_3$As$_2$ form a single Dirac point at $螕$, is much lower [x$_c$(P)$<$ 0.34(3)] than the predicted value of x$_c$(P)=0.9. Therefore, our results suggest that the nontrivial band topology of Cd$_3$As$_2$ is remarkably sensitive to the P substitution and can only survive over a narrow substitution range, i.e., 0 $\leq$ x (P) $<$ 0.34(3). <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1802.04045v1-abstract-full').style.display = 'none'; document.getElementById('1802.04045v1-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> 12 February, 2018; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> February 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">3 figures, 5 pages</span> </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Journal ref:</span> Phys. Rev. B 98, 085145 (2018) </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/1708.03233">arXiv:1708.03233</a> <span> [<a href="https://arxiv.org/pdf/1708.03233">pdf</a>, <a href="https://arxiv.org/format/1708.03233">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.97.035133">10.1103/PhysRevB.97.035133 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> Observation of Dirac surface states in the hexagonal PtBi2, a possible origin of the linear magnetoresistance </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/cond-mat?searchtype=author&query=Thirupathaiah%2C+S">S. Thirupathaiah</a>, <a href="/search/cond-mat?searchtype=author&query=Kushnirenko%2C+Y">Y. Kushnirenko</a>, <a href="/search/cond-mat?searchtype=author&query=Haubold%2C+E">E. Haubold</a>, <a href="/search/cond-mat?searchtype=author&query=Fedorov%2C+A+V">A. V. Fedorov</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=Kim%2C+T+K">T. K. Kim</a>, <a href="/search/cond-mat?searchtype=author&query=Yaresko%2C+A+N">A. N. Yaresko</a>, <a href="/search/cond-mat?searchtype=author&query=Blum%2C+C+G+F">C. G. F. Blum</a>, <a href="/search/cond-mat?searchtype=author&query=Aswartham%2C+S">S. Aswartham</a>, <a href="/search/cond-mat?searchtype=author&query=B%C3%BCchner%2C+B">B. B眉chner</a>, <a href="/search/cond-mat?searchtype=author&query=Borisenko%2C+S+V">S. V. 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="1708.03233v1-abstract-short" style="display: inline;"> The nonmagnetic compounds showing extremely large magnetoresistance are attracting a great deal of research interests due to their potential applications in the field of spintronics. PtBi$_2$ is one of such interesting compounds showing large linear magnetoresistance (MR) in its both the hexagonal and pyrite crystal structure. We use angle-resolved photoelectron spectroscopy (ARPES) and density fu… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1708.03233v1-abstract-full').style.display = 'inline'; document.getElementById('1708.03233v1-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="1708.03233v1-abstract-full" style="display: none;"> The nonmagnetic compounds showing extremely large magnetoresistance are attracting a great deal of research interests due to their potential applications in the field of spintronics. PtBi$_2$ is one of such interesting compounds showing large linear magnetoresistance (MR) in its both the hexagonal and pyrite crystal structure. We use angle-resolved photoelectron spectroscopy (ARPES) and density functional theory (DFT) calculations to understand the mechanism of liner MR observed in the hexagonal PtBi$_2$. Our results uncover for the first time linear dispersive surface Dirac states at the $\bar螕$-point, crossing Fermi level with node at a binding energy of $\approx$ 900 meV, in addition to the previously reported Dirac states at the $\bar{M}$-point in the same compound. We further notice from our dichroic measurements that these surface states show an asymmetric spectral intensity when measured with left and right circularly polarized light, hinting at a substantial spin polarization of the bands. Following these observations, we suggest that the linear dispersive Dirac states at the $\bar螕$ and $\bar{M}$-points are likely to play a crucial role for the linear field dependent magnetoresistance recorded in this compound. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1708.03233v1-abstract-full').style.display = 'none'; document.getElementById('1708.03233v1-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> 10 August, 2017; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> August 2017. </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Journal ref:</span> Phys. Rev. B 97, 035133 (2018) </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/1702.02088">arXiv:1702.02088</a> <span> [<a href="https://arxiv.org/pdf/1702.02088">pdf</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="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/10.1103/PhysRevB.96.100504">10.1103/PhysRevB.96.100504 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> Anomalous temperature evolution of the electronic structure of FeSe </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/cond-mat?searchtype=author&query=Kushnirenko%2C+Y">Y. Kushnirenko</a>, <a href="/search/cond-mat?searchtype=author&query=Kordyuk%2C+A+A">A. A. Kordyuk</a>, <a href="/search/cond-mat?searchtype=author&query=Fedorov%2C+A">A. Fedorov</a>, <a href="/search/cond-mat?searchtype=author&query=Haubold%2C+E">E. Haubold</a>, <a href="/search/cond-mat?searchtype=author&query=Wolf%2C+T">T. Wolf</a>, <a href="/search/cond-mat?searchtype=author&query=B%C3%BCchner%2C+B">B. B眉chner</a>, <a href="/search/cond-mat?searchtype=author&query=Borisenko%2C+S+V">S. V. 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="1702.02088v1-abstract-short" style="display: inline;"> We present ARPES data taken from the structurally simplest representative of iron-based superconductors, FeSe, in a wide temperature range. Apart from the variations related to the nematic transition, we detect very pronounced shifts of the dispersions on the scale of hundreds of kelvins. Remarkably, upon warming the sample up, the band structure has a tendency to relax to the one predicted by con… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1702.02088v1-abstract-full').style.display = 'inline'; document.getElementById('1702.02088v1-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="1702.02088v1-abstract-full" style="display: none;"> We present ARPES data taken from the structurally simplest representative of iron-based superconductors, FeSe, in a wide temperature range. Apart from the variations related to the nematic transition, we detect very pronounced shifts of the dispersions on the scale of hundreds of kelvins. Remarkably, upon warming the sample up, the band structure has a tendency to relax to the one predicted by conventional band structure calculations, right opposite to what is intuitively expected. Our findings shed light on the origin of the dominant interaction shaping the electronic states responsible for high-temperature superconductivity in iron-based materials. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1702.02088v1-abstract-full').style.display = 'none'; document.getElementById('1702.02088v1-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> 7 February, 2017; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> February 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">8 pages, 4 figures, PDF only</span> </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Journal ref:</span> Phys. Rev. B 96, 100504 (2017) </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/1609.09549">arXiv:1609.09549</a> <span> [<a href="https://arxiv.org/pdf/1609.09549">pdf</a>, <a href="https://arxiv.org/format/1609.09549">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/10.1103/PhysRevB.95.241108">10.1103/PhysRevB.95.241108 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> Experimental realization of type-II Weyl state in non-centrosymmetric TaIrTe$_4$ </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/cond-mat?searchtype=author&query=Haubold%2C+E">E. Haubold</a>, <a href="/search/cond-mat?searchtype=author&query=Koepernik%2C+K">K. Koepernik</a>, <a href="/search/cond-mat?searchtype=author&query=Efremov%2C+D">D. Efremov</a>, <a href="/search/cond-mat?searchtype=author&query=Khim%2C+S">S. Khim</a>, <a href="/search/cond-mat?searchtype=author&query=Fedorov%2C+A">A. Fedorov</a>, <a href="/search/cond-mat?searchtype=author&query=Kushnirenko%2C+Y">Y. Kushnirenko</a>, <a href="/search/cond-mat?searchtype=author&query=Brink%2C+J+v+d">J. van den Brink</a>, <a href="/search/cond-mat?searchtype=author&query=Wurmehl%2C+S">S. Wurmehl</a>, <a href="/search/cond-mat?searchtype=author&query=B%7Fuchner%2C+B">B. Buchner</a>, <a href="/search/cond-mat?searchtype=author&query=Kim%2C+T+K">T. K. Kim</a>, <a href="/search/cond-mat?searchtype=author&query=Hoesch%2C+M">M. Hoesch</a>, <a href="/search/cond-mat?searchtype=author&query=Sumida%2C+K">K. Sumida</a>, <a href="/search/cond-mat?searchtype=author&query=Taguchi%2C+K">K. Taguchi</a>, <a href="/search/cond-mat?searchtype=author&query=Yoshikawa%2C+T">T. Yoshikawa</a>, <a href="/search/cond-mat?searchtype=author&query=Kimura%2C+A">A. Kimura</a>, <a href="/search/cond-mat?searchtype=author&query=Okuda%2C+T">T. Okuda</a>, <a href="/search/cond-mat?searchtype=author&query=Borisenko%2C+S+V">S. V. 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="1609.09549v1-abstract-short" style="display: inline;"> Recent breakthrough in search for the analogs of fundamental particles in condensed matter systems lead to experimental realizations of 3D Dirac and Weyl semimetals. Weyl state can be hosted either by non-centrosymmetric or magnetic materials and can be of the first or the second type. Several non-centrosymmetric materials have been proposed to be type-II Weyl semimetals, but in all of them the Fe… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1609.09549v1-abstract-full').style.display = 'inline'; document.getElementById('1609.09549v1-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="1609.09549v1-abstract-full" style="display: none;"> Recent breakthrough in search for the analogs of fundamental particles in condensed matter systems lead to experimental realizations of 3D Dirac and Weyl semimetals. Weyl state can be hosted either by non-centrosymmetric or magnetic materials and can be of the first or the second type. Several non-centrosymmetric materials have been proposed to be type-II Weyl semimetals, but in all of them the Fermi arcs between projections of multiple Weyl points either have not been observed directly or they were hardly distinguishable from the trivial surface states which significantly hinders the practical application of these materials. Here we present experimental evidence for type-II non-centrosymmetric Weyl state in TaIrTe$_4$ where it has been predicted theoretically. We find direct correspondence between ARPES spectra and calculated electronic structure both in the bulk and the surface and clearly observe the exotic surface states which support the quasi-1D Fermi arcs connecting only four Weyl points. Remarkably, these electronic states are spin-polarized in the direction along the arcs, thus highlighting TaIrTe$_4$ as a novel material with promising application potential. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1609.09549v1-abstract-full').style.display = 'none'; document.getElementById('1609.09549v1-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> 29 September, 2016; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> September 2016. </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">9 pages, 4 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 95, 241108 (2017) </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/1606.03022">arXiv:1606.03022</a> <span> [<a href="https://arxiv.org/pdf/1606.03022">pdf</a>, <a href="https://arxiv.org/format/1606.03022">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="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/srep36834">10.1038/srep36834 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> Effect of nematic ordering on electronic structure of FeSe </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/cond-mat?searchtype=author&query=Fedorov%2C+A">A. Fedorov</a>, <a href="/search/cond-mat?searchtype=author&query=Yaresko%2C+A">A. Yaresko</a>, <a href="/search/cond-mat?searchtype=author&query=Kim%2C+T+K">T. K. Kim</a>, <a href="/search/cond-mat?searchtype=author&query=Kushnirenko%2C+E">E. Kushnirenko</a>, <a href="/search/cond-mat?searchtype=author&query=Haubold%2C+E">E. Haubold</a>, <a href="/search/cond-mat?searchtype=author&query=Wolf%2C+T">T. Wolf</a>, <a href="/search/cond-mat?searchtype=author&query=Hoesch%2C+M">M. Hoesch</a>, <a href="/search/cond-mat?searchtype=author&query=Grueneis%2C+A">A. Grueneis</a>, <a href="/search/cond-mat?searchtype=author&query=Buechner%2C+B">B. Buechner</a>, <a href="/search/cond-mat?searchtype=author&query=Borisenko%2C+S+V">S. V. 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="1606.03022v1-abstract-short" style="display: inline;"> Electronically driven nematic order is often considered as an essential ingredient of high-temperature superconductivity. Its elusive nature in iron-based supercon- ductors resulted in a controversy not only as regards its origin but also as to the degree of its influence on the electronic structure even in the simplest representative material FeSe. Here we utilized angle-resolved photoemission sp… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1606.03022v1-abstract-full').style.display = 'inline'; document.getElementById('1606.03022v1-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="1606.03022v1-abstract-full" style="display: none;"> Electronically driven nematic order is often considered as an essential ingredient of high-temperature superconductivity. Its elusive nature in iron-based supercon- ductors resulted in a controversy not only as regards its origin but also as to the degree of its influence on the electronic structure even in the simplest representative material FeSe. Here we utilized angle-resolved photoemission spectroscopy and density functional theory calculations to study the influence of the nematic order on the electronic structure of FeSe and determine its exact energy and momentum scales. Our results strongly suggest that the nematicity in FeSe is electronically driven, we resolve the recent controversy and provide the necessary quantitative experimental basis for a successful theory of superconductivity in iron-based materials which takes into account both, spin-orbit interaction and electronic nematicity. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1606.03022v1-abstract-full').style.display = 'none'; document.getElementById('1606.03022v1-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> 9 June, 2016; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> June 2016. </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">15 pages, 4 figures</span> </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Journal ref:</span> Scientific Reports 6, 36834 (2016) </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 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