气候变化领域集成服务门户(CCPortal): Giant spontaneous Hall effect in a nonmagnetic Weyl

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DOI	10.1073/pnas.2013386118
	Giant spontaneous Hall effect in a nonmagnetic Weyl–Kondo semimetal
	Dzsaber S.; Yan X.; Taupin M.; Eguchi G.; Prokofiev A.; Shiroka T.; Blaha P.; Rubel O.; Grefe S.E.; Lai H.-H.; Si Q.; Paschen S.
发表日期	2021
ISSN	00278424
卷号	118 期号:8
英文摘要	Nontrivial topology in condensed-matter systems enriches quantum states of matter to go beyond either the classification into metals and insulators in terms of conventional band theory or that of symmetry-broken phases by Landau’s order parameter framework. So far, focus has been on weakly interacting systems, and little is known about the limit of strong electron correlations. Heavy fermion systems are a highly versatile platform to explore this regime. Here we report the discovery of a giant spontaneous Hall effect in the Kondo semimetal Ce3Bi4Pd3 that is noncentrosymmetric but preserves time-reversal symmetry. We attribute this finding to Weyl nodes—singularities of the Berry curvature—that emerge in the immediate vicinity of the Fermi level due to the Kondo interaction. We stress that this phenomenon is distinct from the previously detected anomalous Hall effect in materials with broken time-reversal symmetry; instead, it manifests an extreme topological response that requires a beyond-perturbation-theory description of the previously proposed nonlinear Hall effect. The large magnitude of the effect in even tiny electric and zero magnetic fields as well as its robust bulk nature may aid the exploitation in topological quantum devices. © 2021 National Academy of Sciences. All rights reserved.
英文关键词	Kondo effect; Preserved time-reversal symmetry; Spontaneous Hall effect; Weyl semimetal
语种	英语
scopus关键词	article; berry; fermion; magnetic field; physiological stress
来源期刊	Proceedings of the National Academy of Sciences of the United States of America
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/180573
作者单位	Institute of Solid State Physics, Vienna University of Technology, Vienna, 1040, Austria; Laboratorium für Festkörperphysik, ETH Zürich, Zurich, 8093, Switzerland; Paul Scherrer Institut, Villigen PSI, 5232, Switzerland; Institute of Materials Chemistry, Vienna University of Technology, Vienna, 1040, Austria; Department of Materials Science and Engineering, McMaster University, Hamilton, ON L8S 4L8, Canada; Department of Physics and Astronomy, Rice Center for Quantum Materials, Rice University, Houston, TX 77005, United States
推荐引用方式 GB/T 7714	Dzsaber S.,Yan X.,Taupin M.,等. Giant spontaneous Hall effect in a nonmagnetic Weyl–Kondo semimetal[J],2021,118(8).
APA	Dzsaber S..,Yan X..,Taupin M..,Eguchi G..,Prokofiev A..,...&Paschen S..(2021).Giant spontaneous Hall effect in a nonmagnetic Weyl–Kondo semimetal.Proceedings of the National Academy of Sciences of the United States of America,118(8).
MLA	Dzsaber S.,et al."Giant spontaneous Hall effect in a nonmagnetic Weyl–Kondo semimetal".Proceedings of the National Academy of Sciences of the United States of America 118.8(2021).