Planar Hall effect in Cu intercalated PdTe$_2$

TL;DR

This study investigates the Planar Hall effect in Cu-intercalated PdTe$_2$, a type-II Dirac semimetal, revealing complex anisotropic behaviors and emphasizing the role of Fermi surface anisotropy in interpreting the effect.

Contribution

It provides new insights into the origin of the Planar Hall effect in type-II Dirac semimetals, highlighting the importance of Fermi surface anisotropy.

Findings

Positive field dependence of resistivity in all directions

Linear low-temperature magnetoresistance behavior

Fermi surface anisotropy influences Planar Hall effect interpretation

Abstract

We present the Planar Hall effect studies on the Cu intercalated type-II Dirac semimetal PdTe$_{2}$. The electrical resistivity exhibits a positive field dependence both in perpendicular and parallel field directions, causing non-zero anisotropy. The longitudinal magnetoresistance shows almost linear field dependence at low temperatures. A tilted prolate spheroid shaped orbits are observed in parametric plot between transverse and longitudinal resistivities. Our study suggest that for the type-II Dirac semimetal materials with positive longitudinal magnetoresistance, the origin of Planar Hall effect cannot be asserted with certainty to the topological or non-topological without taking into account the anisotropy of Fermi surface.