各向异性
半金属
点反射
物理
凝聚态物理
拓扑(电路)
量子力学
电气工程
工程类
带隙
作者
Yongjian Wang,Henry F. Legg,Thomas Boemerich,Jin‐Hong Park,S. Biesenkamp,A. A. Taskin,M. Braden,Achim Rosch,Yoichi Ando
标识
DOI:10.1103/physrevlett.128.176602
摘要
Topological materials with broken inversion symmetry can give rise to nonreciprocal responses, such as the current rectification controlled by magnetic fields via magnetochiral anisotropy. Bulk nonreciprocal responses usually stem from relativistic corrections and are always very small. Here we report our discovery that ZrTe_{5} crystals in proximity to a topological quantum phase transition present gigantic magnetochiral anisotropy, which is the largest ever observed to date. We argue that a very low carrier density, inhomogeneities, and a torus-shaped Fermi surface induced by breaking of inversion symmetry in a Dirac material are central to explain this extraordinary property.
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