Unusual interlayer quantum transport behavior caused by the zeroth Landau level in YbMnBi₂.

ABSTRACT: Relativistic fermions in topological quantum materials are characterized by linear energy-momentum dispersion near band crossing points. Under magnetic fields, relativistic fermions acquire Berry phase of π in cyclotron motion, leading to a zeroth Landau level (LL) at the crossing point, a signature unique to relativistic fermions. Here we report the unusual interlayer quantum transport behavior resulting from the zeroth LL mode observed in the time reversal symmetry breaking type II Weyl semimetal YbMnBi₂. The interlayer magnetoresistivity and Hall conductivity of this material are found to exhibit surprising angular dependences under high fields, which can be well fitted by a model, which considers the interlayer quantum tunneling transport of the zeroth LL's Weyl fermions. Ou

SUBMITTER: Liu JY 

PROVIDER: S-EPMC5608808 | biostudies-literature | 2017 Sep

REPOSITORIES: biostudies-literature