Planar Hall effect and large anisotropic magnetoresistance in a topological superconductor candidate Cu0.05PdTe2

Guolin Feng,Yuyan Han,Zhiqiang Wu,Hui Huang,Changjin Zhang

doi:10.1063/5.0082533

Abstract

We report the observation of a large anisotropic magnetoresistance (AMR) and planar Hall effect (PHE) in a topological superconducting candidate Cu0.05PdTe2. The AMR and PHE data in Cu0.05PdTe2 can be well explained by the semiclassical theory, confirming that the magneto-transport behaviors of the Cu0.05PdTe2 superconductor are related to its topological nature. The AMR ratio in Cu0.05PdTe2 is one order of magnitude larger than those in traditional ferromagnetic metals. The present results suggest that Cu0.05PdTe2 is a promising material in future magnetoresistive devices with low power consumption.

Highlights

Similar to the experimental realization of bulk superconductivity by intercalation of Cu, Sr, and Nb in the van der Waals gaps in Bi2Se3,35–37 an enhanced bulk superconductivity could be realized by intercalation of Cu in PdTe2.38,39 unlike the intensive investigations of possible features of topological superconductivity and other intriguing quantum phenomena in intercalated Bi2Se3, the physical properties of topological superconducting candidate CuxPdTe2 have not been comprehensively investigated yet
We report the observation of anisotropic magnetoresistance (AMR) and planar Hall effect in Cu0.05PdTe2
It is found that the AMR ratio in Cu0.05PdTe2 is much larger than those in conventional ferromagnetic metals, suggesting that Cu0.05PdTe2 is a promising material in future magnetoresistive devices, such as magnetic sensors and magnetoresistive switches

Summary

Introduction

PdTe2 is a type-II Dirac semimetal and advocated to be an improved platform for topological superconductivity.32–34 Similar to the experimental realization of bulk superconductivity by intercalation of Cu, Sr, and Nb in the van der Waals gaps in Bi2Se3,35–37 an enhanced bulk superconductivity could be realized by intercalation of Cu in PdTe2.38,39 unlike the intensive investigations of possible features of topological superconductivity and other intriguing quantum phenomena in intercalated Bi2Se3, the physical properties of topological superconducting candidate CuxPdTe2 have not been comprehensively investigated yet. It is later found that besides the scitation.org/journal/adv chiral anomaly, PHE may have other origins in various systems, such as anisotropic magnetic scattering,29 orbital magnetoresistance,30 and spin–momentum locking of surface states.31 it requires more experimental data of PHE to be discovered in quantum materials, and more importantly, to investigate whether or not the PHE is related to the topological features.

Results

Conclusion