Origin of the Anomalous Electrical Transports in Quasi-One-Dimensional Ta2NiSe7

Lanxin Liu; Xuan Luo; Xingcai Yang; Yang Li; Wenqian Tu; Ming Cheng; Tianyang Wang; Nan Zhou; Ranran Zhang; Xiaoguang Zhu; Wenhai Song; Wenjian Lu; Jinsong Chen; Yuping Sun

doi:10.1021/acs.jpclett.3c02922

Origin of the Anomalous Electrical Transports in Quasi-One-Dimensional Ta₂NiSe₇

J Phys Chem Lett. 2023 Dec 7;14(48):10736-10747. doi: 10.1021/acs.jpclett.3c02922. Epub 2023 Nov 27.

Authors

Lanxin Liu^{1

2}, Xuan Luo¹, Xingcai Yang^{1

2}, Yang Li³, Wenqian Tu^{1

2}, Ming Cheng^{1

2}, Tianyang Wang^{1

2}, Nan Zhou¹, Ranran Zhang⁴, Xiaoguang Zhu¹, Wenhai Song¹, Wenjian Lu¹, Jinsong Chen³, Yuping Sun^{1

4

5}

Affiliations

¹ Key Laboratory of Materials Physics, Institute of Solid State Physics, HFIPS, Chinese Academy of Sciences, Hefei, 230031, China.
² Science Island Branch of Graduate School, University of Science and Technology of China, Hefei, 230026, China.
³ Southwest Institute of Applied Magnetics, Mianyang, 621000, China.
⁴ Anhui Province Key Laboratory of Condensed Matter Physics at Extreme Conditions, High Magnetic Field Laboratory, Chinese Academy of Sciences, Hefei, 230031, China.
⁵ Collaborative Innovation Center of Advanced Microstructures, Nanjing University, Nanjing, 210093, China.

PMID: 38010350
DOI: 10.1021/acs.jpclett.3c02922

Abstract

Exploration of exotic transport behavior is of great interest and importance for revealing the properties of the CDW phase of quasi-one-dimensional Ta₂NiSe₇. We report the anisotropic electrical transport properties of Ta₂NiSe₇ single crystals in the CDW phase. The anisotropic constant (γ = ρ_b/ρ_c) increased rapidly at T_CDW = 60 K upon cooling. The results of the Hall resistivity show that both the concentrations and mobilities of carriers change abruptly at T_CDW. The out-of-plane AMR exhibits C₂ and C₄ symmetry components while the in-plane AMR exhibits C₂, C₄, and C₆ at the CDW state. The planar Hall effect is observed in Ta₂NiSe₇ at low temperature, which is suggested to originate from the anisotropic orbital magnetoresistance. The calculated results show that the Fermi surface of Ta₂NiSe₇ was slightly reconstructed due to the CDW transition. This work highlights the enhancement of Fermi surface anisotropy during CDW formation and provides a novel approach to study the CDW materials.