Magnetotransport signatures of Weyl physics and discrete scale invariance in the elemental semiconductor tellurium.

ABSTRACT: The study of topological materials possessing nontrivial band structures enables exploitation of relativistic physics and development of a spectrum of intriguing physical phenomena. However, previous studies of Weyl physics have been limited exclusively to semimetals. Here, via systematic magnetotransport measurements, two representative topological transport signatures of Weyl physics, the negative longitudinal magnetoresistance and the planar Hall effect, are observed in the elemental semiconductor tellurium. More strikingly, logarithmically periodic oscillations in both the magnetoresistance and Hall data are revealed beyond the quantum limit and found to share similar characteristics with those observed in ZrTe₅ and HfTe₅ The log-periodic oscillations originate fr

SUBMITTER: Zhang N 

PROVIDER: S-EPMC7260958 | biostudies-literature | 2020 May

REPOSITORIES: biostudies-literature