Anisotropic magneto-transport and magnetic properties of low-temperature phase of TaTe₂

¹ Research & Development Center for Functional Crystals, Beijing National Laboratory for Condensed Matter Physics, Institute of Physics, Chinese Academy of Sciences - Beijing 100190, China
² School of Physical Sciences, University of Chinese Academy of Sciences - Beijing 100049, China
³ Collaborative Innovation Center of Quantum Matter - Beijing 100084, China

^(a) lwguo@iphy.ac.cn
^(b) chenx29@iphy.ac.cn

Received: 9 December 2016
Accepted: 21 February 2017

Abstract

TaTe₂ is a quasi-2D charge density wave (CDW) compound with distorted-1T–type structure exhibiting double-zigzag chains. Here we report the Fermi surface topology of a low-temperature phase of TaTe₂ (LT-TaTe₂) by anisotropic magneto-transport and magnetic measurements on high-quality single crystals. An anomalous large linear magnetoresistance up to 140% at 3 K in 9 T was observed, suggesting the existence of a small Fermi pocket in the Dirac cone state in quantum transport models. Moreover, strong magnetic anisotropy was observed for B⊥(001) and B∥(001). Angle-dependent magnetoresistance and de Hass-van Alphen oscillations suggest the anisotropy of the normal Fermi surface and the small Fermi pocket in Dirac cone state.