Origin of extremely large magnetoresistance in the candidate type-II Weyl semimetal MoTe_2-x.

ABSTRACT: The recent observation of extremely large magnetoresistance (MR) in the transition-metal dichalcogenide MoTe₂ has attracted considerable interest due to its potential technological applications as well as its relationship with novel electronic states predicted for a candidate type-II Weyl semimetal. In order to understand the origin of the MR, the electronic structure of MoTe_2-x (x = 0.08) is systematically tuned by application of pressure and probed via its Hall and longitudinal conductivities. With increasing pressure, a monoclinic-to-orthorhombic (1 T' to T_d) structural phase transition temperature (T*) gradually decreases from 210 K at 1 bar to 58 K at 1.1 GPa, and there is no anomaly associated with the phase transition at 1.4 GPa, indicating that a T 

SUBMITTER: Lee S 

PROVIDER: S-EPMC6141610 | biostudies-literature | 2018 Sep

REPOSITORIES: biostudies-literature