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arXiv · 2103.14207

Anisotropic transport and de Haas$-$van Alphen oscillations in quasi-one-dimensional TaPtTe$_5$

Wen-He Jiao·Shaozhu Xiao·Bin Li·Chunqiang Xu·Xiao-Meng Xie·Hang-Qiang Qiu·Xiaofeng Xu·Yi Liu·Shi-Jie Song·Wei Zhou·Hui-Fei Zhai·X. Ke·Shaolong He·Guang-Han Cao
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Abstract

Because of the unique physical properties and potential applications, the exploration of quantum materials with diverse symmetry-protected topological states has attracted considerable interest in the condensed-matter community in recent years. Most of the topologically nontirvial materials identified thus far have two-dimensional or three-dimensional structural characteristics, while the quasi-one-dimensional (quasi-1D) analogs are rare. Here we report on anisotropic magnetoresistance, Hall effect, and quantum de Haas$-$van Alphen (dHvA) oscillations in TaPtTe$_5$ single crystals, which possess a layered crystal structure with quasi-1D PtTe$_2$ chains. TaPtTe$_5$ manifests an anisotropic magnetoresistance and a nonlinear Hall effect at low temperatures. The analysis of the dHvA oscillations reveals two major oscillation frequencies (63.5 T and 95.2 T). The corresponding light effective masses and the nonzero Berry phases suggest the nontrivial band topology in TaPtTe$_5$, which is further corroborated by the first-principles calculations. Our results suggest that TaPtTe$_5$, in analogy with its sister compounds TaPdTe$_5$ and TaNiTe$_5$, is another quasi-1D material hosting topological Dirac fermions.

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Wen-He Jiao, Shaozhu Xiao, Bin Li, Chunqiang Xu, Xiao-Meng Xie, Hang-Qiang Qiu, Xiaofeng Xu, Yi Liu, Shi-Jie Song, Wei Zhou, Hui-Fei Zhai, X. Ke, Shaolong He, Guang-Han Cao. 2021-03-26. Anisotropic transport and de Haas$-$van Alphen oscillations in quasi-one-dimensional TaPtTe$_5$. https://doi.org/10.1103/physrevb.103.125150

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