Signatures of quantum criticality in pure Cr at high pressure.

Proceedings of the National Academy of Sciences of the United States of America
R JaramilloT F Rosenbaum

Abstract

The elemental antiferromagnet Cr at high pressure presents a new type of naked quantum critical point that is free of disorder and symmetry-breaking fields. Here we measure magnetotransport in fine detail around the critical pressure, Pc approximately 10 GPa, in a diamond anvil cell and reveal the role of quantum critical fluctuations at the phase transition. As the magnetism disappears and T-->0, the magnetotransport scaling converges to a non-mean-field form that illustrates the reconstruction of the magnetic Fermi surface, and is distinct from the critical scaling measured in chemically disordered CrV under pressure. The breakdown of itinerant antiferromagnetism only comes clearly into view in the clean limit, establishing disorder as a relevant variable at a quantum phase transition.

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Citations

Apr 25, 2012·Proceedings of the National Academy of Sciences of the United States of America·Yejun FengT F Rosenbaum
Nov 7, 2012·The Review of Scientific Instruments·R JaramilloT F Rosenbaum
Nov 20, 2014·Nature Communications·Wei WuJianlin Luo
Oct 3, 2014·The Review of Scientific Instruments·J-G ChengY Uwatoko
Oct 3, 2015·The Review of Scientific Instruments·A PalmerT F Rosenbaum
Feb 13, 2013·Proceedings of the National Academy of Sciences of the United States of America·Yejun FengT F Rosenbaum
Jun 10, 2017·Journal of Physics. Condensed Matter : an Institute of Physics Journal·J M SantiagoE Morosan
Feb 23, 2011·Journal of Physics. Condensed Matter : an Institute of Physics Journal·Sven FriedemannQimiao Si
Jul 19, 2019·IUCrJ·Yishu WangYejun Feng
Jul 5, 2016·Reports on Progress in Physics·Frank Steglich, Steffen Wirth
Jun 18, 2021·Science Advances·Wesley T FuhrmanSilke Paschen
Jul 2, 2021·Journal of Physics. Condensed Matter : an Institute of Physics Journal·A S BelozerovV I Anisimov

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