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

TL;DR

This study investigates the low temperature phase of TaTe2, revealing large linear magnetoresistance and magnetic anisotropy, indicating the presence of Dirac cone states and anisotropic Fermi surface features.

Contribution

It provides the first detailed analysis of the Fermi surface topology and magneto-transport properties of LT-TaTe2 using anisotropic measurements on high-quality single crystals.

Findings

Observed up to 140% linear magnetoresistance at 3 K in 9 T

Detected strong magnetic anisotropy related to Fermi surface features

Identified small Fermi pocket consistent with Dirac cone states

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 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 Dirac cone state in quantum transport models. Meanwhile, 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.