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<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/PhysRevLett.123.247203">10.1103/PhysRevLett.123.247203 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> Ultra-small moment incommensurate spin density wave order masking a ferromagnetic quantum critical point in NbFe$_2$ </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/cond-mat?searchtype=author&query=Niklowitz%2C+P+G">P. G. Niklowitz</a>, <a href="/search/cond-mat?searchtype=author&query=Hirschberger%2C+M">M. Hirschberger</a>, <a href="/search/cond-mat?searchtype=author&query=Lucas%2C+M">M. Lucas</a>, <a href="/search/cond-mat?searchtype=author&query=Cermak%2C+P">P. Cermak</a>, <a href="/search/cond-mat?searchtype=author&query=Schneidewind%2C+A">A. Schneidewind</a>, <a href="/search/cond-mat?searchtype=author&query=Faulhaber%2C+E">E. Faulhaber</a>, <a href="/search/cond-mat?searchtype=author&query=Mignot%2C+J+-">J. -M. Mignot</a>, <a href="/search/cond-mat?searchtype=author&query=Duncan%2C+W+J">W. J. Duncan</a>, <a href="/search/cond-mat?searchtype=author&query=Neubauer%2C+A">A. Neubauer</a>, <a href="/search/cond-mat?searchtype=author&query=Pfleiderer%2C+C">C. Pfleiderer</a>, <a href="/search/cond-mat?searchtype=author&query=Grosche%2C+F+M">F. M. Grosche</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="1704.08379v2-abstract-short" style="display: inline;"> In the metallic magnet Nb$_{1-y}$Fe$_{2+y}$, the low temperature threshold of ferromagnetism can be investigated by varying the Fe excess $y$ within a narrow homogeneity range. We use elastic neutron scattering to track the evolution of magnetic order from Fe-rich, ferromagnetic Nb$_{0.981}$Fe$_{2.019}$ to approximately stoichiometric NbFe$_2$, in which we can, for the first time, characterise a l… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1704.08379v2-abstract-full').style.display = 'inline'; document.getElementById('1704.08379v2-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="1704.08379v2-abstract-full" style="display: none;"> In the metallic magnet Nb$_{1-y}$Fe$_{2+y}$, the low temperature threshold of ferromagnetism can be investigated by varying the Fe excess $y$ within a narrow homogeneity range. We use elastic neutron scattering to track the evolution of magnetic order from Fe-rich, ferromagnetic Nb$_{0.981}$Fe$_{2.019}$ to approximately stoichiometric NbFe$_2$, in which we can, for the first time, characterise a long-wavelength spin density wave state burying a ferromagnetic quantum critical point. The associated ordering wavevector $\mathbf{q}_{\rm SDW}=$(0,0,$l_{\rm SDW}$) is found to depend significantly on $y$ and $T$, staying finite but decreasing as the ferromagnetic state is approached. The phase diagram follows a two order-parameter Landau theory, for which all the coefficients can now be determined. Our findings suggest that the emergence of SDW order cannot be attributed to band structure effects alone. They indicate a common microscopic origin of both types of magnetic order and provide strong constraints on related theoretical scenarios based on, e.g., quantum order by disorder. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1704.08379v2-abstract-full').style.display = 'none'; document.getElementById('1704.08379v2-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 August, 2019; <span class="has-text-black-bis has-text-weight-semibold">v1</span> submitted 26 April, 2017; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> April 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">Addition of absolute magnetic moment estimates and of a two order-parameter Landau model analysis</span> </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Journal ref:</span> Phys. Rev. Lett. 123, 247203 (2019) </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/1110.5599">arXiv:1110.5599</a> <span> [<a href="https://arxiv.org/pdf/1110.5599">pdf</a>, <a href="https://arxiv.org/format/1110.5599">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/10.1103/PhysRevB.92.115116">10.1103/PhysRevB.92.115116 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> Role of commensurate and incommensurate low-energy excitations in the paramagnetic to hidden-order transition of URu$_2$Si$_2$ </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/cond-mat?searchtype=author&query=Niklowitz%2C+P+G">P. G. Niklowitz</a>, <a href="/search/cond-mat?searchtype=author&query=Dunsiger%2C+S+R">S. R. Dunsiger</a>, <a href="/search/cond-mat?searchtype=author&query=Pfleiderer%2C+C">C. Pfleiderer</a>, <a href="/search/cond-mat?searchtype=author&query=Link%2C+P">P. Link</a>, <a href="/search/cond-mat?searchtype=author&query=Schneidewind%2C+A">A. Schneidewind</a>, <a href="/search/cond-mat?searchtype=author&query=Faulhaber%2C+E">E. Faulhaber</a>, <a href="/search/cond-mat?searchtype=author&query=Vojta%2C+M">M. Vojta</a>, <a href="/search/cond-mat?searchtype=author&query=Huang%2C+Y+-">Y. -K. Huang</a>, <a href="/search/cond-mat?searchtype=author&query=Mydosh%2C+J+A">J. A. Mydosh</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="1110.5599v3-abstract-short" style="display: inline;"> We report low-energy inelastic neutron scattering data of the paramagnetic (PM) to hidden-order (HO) phase transition at $T_0=17.5\,{\rm K}$ in URu$_2$Si$_2$. While confirming previous results for the HO and PM phases, our data reveal a pronounced wavevector dependence of low-energy excitations across the phase transition. To analyze the energy scans we employ a damped harmonic oscillator model co… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1110.5599v3-abstract-full').style.display = 'inline'; document.getElementById('1110.5599v3-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="1110.5599v3-abstract-full" style="display: none;"> We report low-energy inelastic neutron scattering data of the paramagnetic (PM) to hidden-order (HO) phase transition at $T_0=17.5\,{\rm K}$ in URu$_2$Si$_2$. While confirming previous results for the HO and PM phases, our data reveal a pronounced wavevector dependence of low-energy excitations across the phase transition. To analyze the energy scans we employ a damped harmonic oscillator model containing a fit parameter $1/螕$ which is expected to diverge at a second-order phase transition. Counter to expectations the excitations at $\vec{Q}_1=(1.44,0,0)$ show an abrupt step-like suppression of $1/螕$ below $T_0$, whereas excitations at $\vec{Q}_0=(1,0,0)$, associated with large-moment antiferromagnetism (LMAF) under pressure, show an enhancement and a pronounced peak of $1/螕$ at $T_0$. Therefore, at the critical HO temperature $T_0$, LMAF fluctuations become nearly critical as well. This is the behavior expected of a super-vector order parameter with nearly degenerate components for the HO and LMAF leading to nearly isotropic fluctuations in the combined order-parameter space. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1110.5599v3-abstract-full').style.display = 'none'; document.getElementById('1110.5599v3-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 October, 2015; <span class="has-text-black-bis has-text-weight-semibold">v1</span> submitted 25 October, 2011; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> October 2011. </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">6 pages; v3 accepted journal version; minor modifications compared to v2</span> </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Journal ref:</span> Phys. Rev. B 92, 115116 (2015) </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/0910.4267">arXiv:0910.4267</a> <span> [<a href="https://arxiv.org/pdf/0910.4267">pdf</a>, <a href="https://arxiv.org/ps/0910.4267">ps</a>, <a href="https://arxiv.org/format/0910.4267">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/10.1088/0953-8984/22/5/052201">10.1088/0953-8984/22/5/052201 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> High pressure study of BaFe2As2 - role of hydrostaticity and uniaxial stress </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/cond-mat?searchtype=author&query=Duncan%2C+W+J">W. J. Duncan</a>, <a href="/search/cond-mat?searchtype=author&query=Welzel%2C+O+P">O. P. Welzel</a>, <a href="/search/cond-mat?searchtype=author&query=Harrison%2C+C">C. Harrison</a>, <a href="/search/cond-mat?searchtype=author&query=Wang%2C+X+F">X. F. Wang</a>, <a href="/search/cond-mat?searchtype=author&query=Chen%2C+X+H">X. H. Chen</a>, <a href="/search/cond-mat?searchtype=author&query=Grosche%2C+F+M">F. M. Grosche</a>, <a href="/search/cond-mat?searchtype=author&query=Niklowitz%2C+P+G">P. G. Niklowitz</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="0910.4267v1-abstract-short" style="display: inline;"> We investigate the evolution of the electrical resistivity of BaFe2As2 single crystals with pressure. The samples used were from the same batch grown from self flux and showed properties that were highly reproducible. Samples were pressurised using three different pressure media: pentane-isopentane (in a piston cylinder cell), Daphne oil (in an alumina anvil cell) and steatite (in a Bridgman cel… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('0910.4267v1-abstract-full').style.display = 'inline'; document.getElementById('0910.4267v1-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="0910.4267v1-abstract-full" style="display: none;"> We investigate the evolution of the electrical resistivity of BaFe2As2 single crystals with pressure. The samples used were from the same batch grown from self flux and showed properties that were highly reproducible. Samples were pressurised using three different pressure media: pentane-isopentane (in a piston cylinder cell), Daphne oil (in an alumina anvil cell) and steatite (in a Bridgman cell). Each pressure medium has its own intrinsic level of hydrostaticity, which dramatically affects the phase diagram. An increasing uniaxial pressure component in this system quickly reduces spin density wave order and favours the appearance of superconductivity, similar to what is seen in SrFe2As2. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('0910.4267v1-abstract-full').style.display = 'none'; document.getElementById('0910.4267v1-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> 22 October, 2009; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> October 2009. </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">11 pages</span> </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Journal ref:</span> J. Phys.: Condens. Matter 22 (2010) 052201 (IoP Select) </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/0909.2071">arXiv:0909.2071</a> <span> [<a href="https://arxiv.org/pdf/0909.2071">pdf</a>, <a href="https://arxiv.org/ps/0909.2071">ps</a>, <a href="https://arxiv.org/format/0909.2071">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/10.1103/PhysRevLett.104.106406">10.1103/PhysRevLett.104.106406 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> Parasitic small-moment-antiferromagnetism and non-linear coupling of hidden order and antiferromagnetism in URu2Si2 observed by Larmor diffraction </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/cond-mat?searchtype=author&query=Niklowitz%2C+P+G">P. G. Niklowitz</a>, <a href="/search/cond-mat?searchtype=author&query=Pfleiderer%2C+C">C. Pfleiderer</a>, <a href="/search/cond-mat?searchtype=author&query=Keller%2C+T">T. Keller</a>, <a href="/search/cond-mat?searchtype=author&query=Vojta%2C+M">M. Vojta</a>, <a href="/search/cond-mat?searchtype=author&query=Huang%2C+Y+-">Y. -K. Huang</a>, <a href="/search/cond-mat?searchtype=author&query=Mydosh%2C+J+A">J. A. Mydosh</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="0909.2071v1-abstract-short" style="display: inline;"> We report simultaneous measurements of the distribution of lattice constants and the antiferromagnetic moment in high-purity URu2Si2, using both Larmor and conventional neutron diffraction, as a function of temperature and pressure up to 18 kbar. We establish that the tiny moment in the hidden order (HO) state is purely parasitic and quantitatively originates from the distribution of lattice con… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('0909.2071v1-abstract-full').style.display = 'inline'; document.getElementById('0909.2071v1-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="0909.2071v1-abstract-full" style="display: none;"> We report simultaneous measurements of the distribution of lattice constants and the antiferromagnetic moment in high-purity URu2Si2, using both Larmor and conventional neutron diffraction, as a function of temperature and pressure up to 18 kbar. We establish that the tiny moment in the hidden order (HO) state is purely parasitic and quantitatively originates from the distribution of lattice constants. Moreover, the HO and large-moment antiferromagnetism (LMAF) at high pressure are separated by a line of first-order phase transitions, which ends in a bicritical point. Thus the HO and LMAF are coupled non-linearly and must have different symmetry, as expected of the HO being, e.g., incommensurate orbital currents, helicity order, or multipolar order. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('0909.2071v1-abstract-full').style.display = 'none'; document.getElementById('0909.2071v1-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> 11 September, 2009; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> September 2009. </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">4 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. Lett. 104 (2010) 106406 </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/0902.1933">arXiv:0902.1933</a> <span> [<a href="https://arxiv.org/pdf/0902.1933">pdf</a>, <a href="https://arxiv.org/format/0902.1933">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/PhysRevLett.102.186602">10.1103/PhysRevLett.102.186602 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> Topological Hall effect in the A-phase of MnSi </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/cond-mat?searchtype=author&query=Neubauer%2C+A">A. Neubauer</a>, <a href="/search/cond-mat?searchtype=author&query=Pfleiderer%2C+C">C. Pfleiderer</a>, <a href="/search/cond-mat?searchtype=author&query=Binz%2C+B">B. Binz</a>, <a href="/search/cond-mat?searchtype=author&query=Rosch%2C+A">A. Rosch</a>, <a href="/search/cond-mat?searchtype=author&query=Ritz%2C+R">R. Ritz</a>, <a href="/search/cond-mat?searchtype=author&query=Niklowitz%2C+P+G">P. G. Niklowitz</a>, <a href="/search/cond-mat?searchtype=author&query=B%C3%B6ni%2C+P">P. B枚ni</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="0902.1933v2-abstract-short" style="display: inline;"> Recent small angle neutron scattering suggests, that the spin structure in the A-phase of MnSi is a so-called triple-$Q$ state, i.e., a superposition of three helices under 120 degrees. Model calculations suggest that this structure in fact is a lattice of so-called skyrmions, i.e., a lattice of topologically stable knots in the spin structure. We report a distinct additional contribution to the… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('0902.1933v2-abstract-full').style.display = 'inline'; document.getElementById('0902.1933v2-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="0902.1933v2-abstract-full" style="display: none;"> Recent small angle neutron scattering suggests, that the spin structure in the A-phase of MnSi is a so-called triple-$Q$ state, i.e., a superposition of three helices under 120 degrees. Model calculations suggest that this structure in fact is a lattice of so-called skyrmions, i.e., a lattice of topologically stable knots in the spin structure. We report a distinct additional contribution to the Hall effect in the temperature and magnetic field range of the proposed skyrmion lattice, where such a contribution is neither seen nor expected for a normal helical state. Our Hall effect measurements constitute a direct observation of a topologically quantized Berry phase that identifies the spin structure seen in neutron scattering as the proposed skyrmion lattice. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('0902.1933v2-abstract-full').style.display = 'none'; document.getElementById('0902.1933v2-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 May, 2009; <span class="has-text-black-bis has-text-weight-semibold">v1</span> submitted 11 February, 2009; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> February 2009. </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Journal ref:</span> Phys. Rev. Lett. 102, 186602 (2009) </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/cond-mat/0610166">arXiv:cond-mat/0610166</a> <span> [<a href="https://arxiv.org/pdf/cond-mat/0610166">pdf</a>, <a href="https://arxiv.org/ps/cond-mat/0610166">ps</a>, <a href="https://arxiv.org/format/cond-mat/0610166">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/10.1103/PhysRevB.77.115135">10.1103/PhysRevB.77.115135 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> Unconventional resistivity at the border of metallic antiferromagnetism in NiS2 </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/cond-mat?searchtype=author&query=Niklowitz%2C+P+G">P. G. Niklowitz</a>, <a href="/search/cond-mat?searchtype=author&query=Steiner%2C+M+J">M. J. Steiner</a>, <a href="/search/cond-mat?searchtype=author&query=Lonzarich%2C+G+G">G. G. Lonzarich</a>, <a href="/search/cond-mat?searchtype=author&query=Braithwaite%2C+D">D. Braithwaite</a>, <a href="/search/cond-mat?searchtype=author&query=Knebel%2C+G">G. Knebel</a>, <a href="/search/cond-mat?searchtype=author&query=Flouquet%2C+J">J. Flouquet</a>, <a href="/search/cond-mat?searchtype=author&query=Wilson%2C+J+A">J. A. Wilson</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="cond-mat/0610166v1-abstract-short" style="display: inline;"> We report low-temperature and high-pressure measurements of the electrical resistivity 蟻(T) of the antiferromagnetic compound NiS_2 in its high-pressure metallic state. The form of 蟻(T) suggests that metallic antiferromagnetism in NiS_2 is quenched at a critical pressure p_c=76+-5 kbar. Near p_c the temperature variation of 蟻(T) is similar to that observed in NiS_{2-x}Se_x near the critical comp… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('cond-mat/0610166v1-abstract-full').style.display = 'inline'; document.getElementById('cond-mat/0610166v1-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="cond-mat/0610166v1-abstract-full" style="display: none;"> We report low-temperature and high-pressure measurements of the electrical resistivity 蟻(T) of the antiferromagnetic compound NiS_2 in its high-pressure metallic state. The form of 蟻(T) suggests that metallic antiferromagnetism in NiS_2 is quenched at a critical pressure p_c=76+-5 kbar. Near p_c the temperature variation of 蟻(T) is similar to that observed in NiS_{2-x}Se_x near the critical composition x=1 where the Neel temperature vanishes at ambient pressure. In both cases 蟻(T) varies approximately as T^{1.5} over a wide range below 100 K. However, on closer analysis the resistivity exponent in NiS_2 exhibits an undulating variation with temperature not seen in NiSSe (x=1). This difference in behaviour may be due to the effects of spin-fluctuation scattering of charge carriers on cold and hot spots of the Fermi surface in the presence of quenched disorder, which is higher in NiSSe than in stoichiometric NiS_2. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('cond-mat/0610166v1-abstract-full').style.display = 'none'; document.getElementById('cond-mat/0610166v1-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> 5 October, 2006; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> October 2006. </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</span> </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Journal ref:</span> Phys. Rev. B 77 (2008) 115135 </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/cond-mat/0507211">arXiv:cond-mat/0507211</a> <span> [<a href="https://arxiv.org/pdf/cond-mat/0507211">pdf</a>, <a href="https://arxiv.org/ps/cond-mat/0507211">ps</a>, <a href="https://arxiv.org/format/cond-mat/0507211">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/10.1103/PhysRevB.73.125101">10.1103/PhysRevB.73.125101 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> Field-induced non-Fermi-liquid resistivity of stoichiometric YbAgGe single crystals </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/cond-mat?searchtype=author&query=Niklowitz%2C+P+G">P. G. Niklowitz</a>, <a href="/search/cond-mat?searchtype=author&query=Knebel%2C+G">G. Knebel</a>, <a href="/search/cond-mat?searchtype=author&query=Flouquet%2C+J">J. Flouquet</a>, <a href="/search/cond-mat?searchtype=author&query=Bud%27ko%2C+S+L">S. L. Bud'ko</a>, <a href="/search/cond-mat?searchtype=author&query=Canfield%2C+P+C">P. C. Canfield</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="cond-mat/0507211v2-abstract-short" style="display: inline;"> We have investigated hexagonal YbAgGe down to 70 mK by measuring the magnetic-field and temperature dependence of the resistivity rho of single crystals in fields up to 14 T. Our results extend the H-T phase diagram to the lowest temperatures for H applied in the basal plane and along the c-axis. In particular, critical fields for the suppression of several magnetic phases are determined. The te… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('cond-mat/0507211v2-abstract-full').style.display = 'inline'; document.getElementById('cond-mat/0507211v2-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="cond-mat/0507211v2-abstract-full" style="display: none;"> We have investigated hexagonal YbAgGe down to 70 mK by measuring the magnetic-field and temperature dependence of the resistivity rho of single crystals in fields up to 14 T. Our results extend the H-T phase diagram to the lowest temperatures for H applied in the basal plane and along the c-axis. In particular, critical fields for the suppression of several magnetic phases are determined. The temperature dependence of rho(T) is unusual: whereas at low H, rho(T) reveals a temperature exponent n>=2, we find 1<=n<1.5 and strong enhancement of the temperature dependence of rho(T) close to and beyond the highest critical field for each field direction. For H applied in the basal plane, at high fields a conventional T^2 dependence of rho(T) is reached above 10 T accompanied by an approach to saturation of a strong drop in the residual resistivity. YbAgGe appears to be one of few Yb-based stoichiometric systems, where quantum-critical behaviour may be induced by a magnetic field. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('cond-mat/0507211v2-abstract-full').style.display = 'none'; document.getElementById('cond-mat/0507211v2-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> 1 February, 2006; <span class="has-text-black-bis has-text-weight-semibold">v1</span> submitted 8 July, 2005; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> July 2005. </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">11 pages, 12 figures; revised version; accepted for publication in Phys.Rev.B</span> </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Journal ref:</span> Phys. Rev. B 73 (2006) 125101 </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/cond-mat/0411451">arXiv:cond-mat/0411451</a> <span> [<a href="https://arxiv.org/pdf/cond-mat/0411451">pdf</a>, <a href="https://arxiv.org/ps/cond-mat/0411451">ps</a>, <a href="https://arxiv.org/format/cond-mat/0411451">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/10.1103/PhysRevB.72.024424">10.1103/PhysRevB.72.024424 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> Spin-fluctuation dominated electrical transport of Ni3Al at high pressure </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/cond-mat?searchtype=author&query=Niklowitz%2C+P+G">P. G. Niklowitz</a>, <a href="/search/cond-mat?searchtype=author&query=Beckers%2C+F">F. Beckers</a>, <a href="/search/cond-mat?searchtype=author&query=Lonzarich%2C+G+G">G. G. Lonzarich</a>, <a href="/search/cond-mat?searchtype=author&query=Knebel%2C+G">G. Knebel</a>, <a href="/search/cond-mat?searchtype=author&query=Salce%2C+B">B. Salce</a>, <a href="/search/cond-mat?searchtype=author&query=Thomasson%2C+J">J. Thomasson</a>, <a href="/search/cond-mat?searchtype=author&query=Bernhoeft%2C+N">N. Bernhoeft</a>, <a href="/search/cond-mat?searchtype=author&query=Braithwaite%2C+D">D. Braithwaite</a>, <a href="/search/cond-mat?searchtype=author&query=Flouquet%2C+J">J. Flouquet</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="cond-mat/0411451v1-abstract-short" style="display: inline;"> We present the first study of a magnetic quantum phase transition in the itinerant-electron ferromagnet Ni3Al at high pressures. Electrical resistivity measurements in a diamond anvil cell at hydrostatic pressures up to 100 kbar and temperatures as low as 50 mK indicate that the Curie temperature collapses towards absolute zero at a critical pressure pc=82(2) kbar. Over wide ranges in pressure a… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('cond-mat/0411451v1-abstract-full').style.display = 'inline'; document.getElementById('cond-mat/0411451v1-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="cond-mat/0411451v1-abstract-full" style="display: none;"> We present the first study of a magnetic quantum phase transition in the itinerant-electron ferromagnet Ni3Al at high pressures. Electrical resistivity measurements in a diamond anvil cell at hydrostatic pressures up to 100 kbar and temperatures as low as 50 mK indicate that the Curie temperature collapses towards absolute zero at a critical pressure pc=82(2) kbar. Over wide ranges in pressure and temperature, both in the ferromagnetic and paramagnetic states, the temperature variation of the resistivity is found to deviate from the conventional Fermi-liquid form. We consider the extent to which this deviation can be understood in terms of a mean-field model of enhanced spin fluctuations on the border of ferromagnetism in three dimensions. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('cond-mat/0411451v1-abstract-full').style.display = 'none'; document.getElementById('cond-mat/0411451v1-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 November, 2004; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> November 2004. </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">11 pages, 10 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 72 (2005) 24424 </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/cond-mat/0410736">arXiv:cond-mat/0410736</a> <span> [<a href="https://arxiv.org/pdf/cond-mat/0410736">pdf</a>, <a href="https://arxiv.org/ps/cond-mat/0410736">ps</a>, <a href="https://arxiv.org/format/cond-mat/0410736">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/10.1088/0953-8984/17/2/006">10.1088/0953-8984/17/2/006 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> Inelastic neutron scattering study of single crystal heavy fermion YbAgGe </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/cond-mat?searchtype=author&query=Fak%2C+B">B. Fak</a>, <a href="/search/cond-mat?searchtype=author&query=McMorrow%2C+D+F">D. F. McMorrow</a>, <a href="/search/cond-mat?searchtype=author&query=Niklowitz%2C+P+G">P. G. Niklowitz</a>, <a href="/search/cond-mat?searchtype=author&query=Raymond%2C+S">S. Raymond</a>, <a href="/search/cond-mat?searchtype=author&query=Ressouche%2C+E">E. Ressouche</a>, <a href="/search/cond-mat?searchtype=author&query=Flouquet%2C+J">J. Flouquet</a>, <a href="/search/cond-mat?searchtype=author&query=Canfield%2C+P+C">P. C. Canfield</a>, <a href="/search/cond-mat?searchtype=author&query=Bud%27ko%2C+S+L">S. L. Bud'ko</a>, <a href="/search/cond-mat?searchtype=author&query=Janssen%2C+Y">Y. Janssen</a>, <a href="/search/cond-mat?searchtype=author&query=Gutmann%2C+M+J">M. J. Gutmann</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="cond-mat/0410736v1-abstract-short" style="display: inline;"> Single crystals of the heavy-fermion compound YbAgGe have been studied by neutron scattering. The magnetic ordering occurring below T1=0.5 K is characterized by a commensurate propagation vector k=(1/3,0,1/3) and the moments in the basal plane of the hexagonal structure. The dynamic magnetic susceptibility is dominated by quasielastic spin fluctuations with a characteristic energy Gamma of the o… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('cond-mat/0410736v1-abstract-full').style.display = 'inline'; document.getElementById('cond-mat/0410736v1-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="cond-mat/0410736v1-abstract-full" style="display: none;"> Single crystals of the heavy-fermion compound YbAgGe have been studied by neutron scattering. The magnetic ordering occurring below T1=0.5 K is characterized by a commensurate propagation vector k=(1/3,0,1/3) and the moments in the basal plane of the hexagonal structure. The dynamic magnetic susceptibility is dominated by quasielastic spin fluctuations with a characteristic energy Gamma of the order of 1 meV. The spins fluctuate predominantly in the basal plane. No spin-wave excitations are observed in the magnetically ordered phase. Below the Kondo temperature, TK=20 K, Gamma shows a strong q dependence for wave vectors along the c* direction, but is q-independent in the basal plane. Gamma shows initially a rapid increase with temperature T at the antiferromagnetic zone center, but follows a standard sqrt(T) law for other q values and for T>TK in general. These observations classify YbAgGe as a well-behaved heavy-fermion compound with a particular q-dependence of the antiferromagnetic spin fluctuations, possibly related to the geometrical frustration of the Yb3+ ions. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('cond-mat/0410736v1-abstract-full').style.display = 'none'; document.getElementById('cond-mat/0410736v1-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 October, 2004; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> October 2004. </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">13 pages</span> </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Journal ref:</span> J. Phys.: Condens. Matter 17 (2005) 301 </p> </li> </ol> <div class="is-hidden-tablet"> <!-- feedback for mobile only --> <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"> <!-- MetaColumn 1 --> <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> <!-- end MetaColumn 1 --> <!-- MetaColumn 2 --> <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> <!-- end MetaColumn 2 --> </div> </footer> <script src="https://static.arxiv.org/static/base/1.0.0a5/js/member_acknowledgement.js"></script> </body> </html>