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Giant in-plane vibrational and transport anisotropy in van der Waals Ta2Ni3Te5

范德华材料Ta2Ni3Te5中巨大的面内振动和输运各向异性

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Abstract

Recently, layered van der Waals compounds of Ta2M3Te5 (M = Ni, Pd) have garnered revived interest due to their appealing potentials to host various exotic electronic states and exhibit nontrivial transport phenomena, such as the Luttinger liquid, quantum spin Hall effect, high-order topology, and superconductivity. In this paper, we report the synthesis of single-crystalline Ta2Ni3Te5 and reveal multifold in-plane anisotropic properties rooted in its quasi-one-dimensional bonding feature within each constituent layer. Our technique combines the power of polarized Raman spectroscopy, angle-resolved photoemission spectroscopy, first-principles calculations, and electrical/magneto-transport measurements. The phononic vibrations of chain-like low symmetric layered structure give rise to a highly anisotropic Raman response. The distinct intra- and inter-chain bonding characteristics lead to anisotropic dispersion of both electronic bands and acoustic phonons, which collectively result in giant in-plane mobility anisotropy (2000%) between the [100] and [001] directions, as verified by our electrical transport and Hall effect measurements. Accordingly, the transport behaviors along different in-plane directions also exhibit distinct temperature and magnetic-field dependence. The rich in-plane anisotropy revealed by the present work shows that Ta2Ni3Te5 is a promising platform for exploring novel two-dimensional anisotropic electronic dynamics with potential applications in next-generation nanoelectronic devices.

摘要

目前, Ta2M3Te5 (M = Ni, Pd)层状范德华化合物可承载各种奇异电子态, 且具有表现出非平凡输运现象的诱人潜力, 因而重新引起人们的兴趣. 其特征有Luttinger液体、量子自旋霍尔效应、高阶拓扑结构和超导电性. 本文中, 我们报道了单晶Ta2Ni3Te5的合成, 并揭示了其在每个具有准一维键合特征的层内的多重平面内各向异性. 我们的技术结合了偏振拉曼光谱、角度分辨光电发射光谱、第一性原理计算和电/磁输运测量的能力. 链状低对称层状结构的声子振动产生了高度各向异性的拉曼响应, 不同的链内和链间键合特性导致电子带和声学声子的各向异性色散, 这共同导致[100]和[001]方向之间的巨大平面内迁移率各向异性(2000%). 这一结果与我们的电输运和霍尔效应测量结果相符. 因此, 沿不同平面内方向的输运行为也表现出不同的温度和磁场依赖性. 本工作揭示的丰富的面内各向异性表明, Ta2Ni3Te5是探索新型二维各向异性电子动力学的一个很有前途的平台, 在下一代纳米电子器件中具有潜在的应用前景.

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Acknowledgements

This work was supported by the Innovation Program for Quantum Science and Technology (2021ZD0302800), the National Natural Science Foundation of China (11904350, 12174362), Anhui Provincial Natural Science Foundation (2008085QA30), Shenzhen Science and Technology Program (KQTD20190929173815000), Guangdong Innovative and Entrepreneurial Research Team Program (2019ZT08C044), and the National Synchrotron Radiation Laboratory (KY2060000177). This research was partially conducted at the Center for Micro and Nanoscale Research and Fabrication, USTC.

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Author notes

  1. These authors contributed equally to this work.

Authors and Affiliations

  1. Department of Materials Science & Engineering, CAS Key Lab of Materials for Energy Conversion, Anhui Laboratory of Advanced Photon Science and Technology, University of Science and Technology of China, Hefei, 230026, China

    Haige Tan  (谈海歌), Ying Zhang  (张颖), Changlong Wang  (王昌龙), Shasha Wang  (王莎莎), Xiang Ma  (马响), Yan Feng  (冯艳), Yalin Lu  (陆亚林) & Bin Xiang  (向斌)

  2. Department of Physics and School of Emerging Technology, University of Science and Technology of China, Hefei, 230026, China

    Zhisheng Zhao  (赵志生) & Juan Jiang  (姜娟)

  3. Anhui Key Laboratory of Condensed Matter Physics at Extreme Conditions, High Magnetic Field Laboratory, Chinese Academy of Sciences, Hefei, 230031, China

    Ranran Zhang  (张冉冉)

  4. Department of Materials Science and Engineering, Southern University of Science and Technology, Shenzhen, 518055, China

    Meng Gu  (谷猛)

  5. International Center for Quantum Design of Functional Materials (ICQD), University of Science and Technology of China, Hefei, 230026, China

    Shunhong Zhang  (张顺洪)

Authors
  1. Haige Tan  (谈海歌)
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  2. Ying Zhang  (张颖)
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  8. Yan Feng  (冯艳)
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  11. Juan Jiang  (姜娟)
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  13. Bin Xiang  (向斌)
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Contributions

Author contributions Tan H designed the experiments and prepared the samples. Tan H, Zhang Y, Zhao Z, Wang C, Zhang R, Wang S, Ma X, and Feng Y performed the measurements and characterizations for most of the analysises. Zhang S conducted the first-principles calculations and provided theoretical support. All authors contributed to the discussion of the results. Tan H, Zhang Y, Zhao ZS, Jiang J, Zhang S, and Xiang B participated in writing and revising the manuscript.

Corresponding authors

Correspondence to Juan Jiang  (姜娟), Shunhong Zhang  (张顺洪) or Bin Xiang  (向斌).

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Conflict of interest The authors declare that they have no conflict of interest.

Additional information

Supplementary information Experimental details and supporting data are available in the online version of the paper.

Haige Tan is a doctoral student at the Department of Materials Science & Engineering, University of Science and Technology of China. His main research interests include the synthesis and characterization of 2D materials, and the fabrication of nanodevices.

Ying Zhang received her PhD degree from the Department of Materials Science & Engineering, University of Science and Technology of China in 2023. Then, she joined the School of Electronic Engineering, Huainan Normal University as a lecturer. Her research interests mainly focus on the fabrication of 2D vdW magnetic materials and their applications in spintronic devices.

Zhisheng Zhao is a doctoral student at the Department of Physics, University of Science and Technology of China. His main research interest is investigating the novel electronic states with ARPES and MBE.

Juan Jiang joined the School of Emerging Technology, University of Science and Technology of China as a professor since 2020. Her research interests mainly focus on the electronic structure of quantum materials, including unconventional superconductors, topological materials, and 2D materials.

Shunhong Zhang received his PhD degree in 2016 from Peking University. He joined the University of Science and Technology of China in 2018. His research interests include low-dimensional magnetic materials, topological materials, and light-element-based nanomaterials.

Bin Xiang received his PhD degree in physics from Peking University in July 2005. During his postdoc appointment at the University of California at San Diego (2005–2007), his research focuses on the nanomaterials and nanodevice applications. During his postdoc appointments at the University of California at Berkeley and Lawrence Berkeley National Lab (2007–2012), his research has expanded into the area of in-situ probing of nanoscale functional materials in TEM. In 2012, Prof. Xiang started his faculty appointment at the Department of Materials Science and Engineering, University of Science and Technology of China, focusing on 2D functional Materials including hetero-integration of 2D quantum materials and exploration of their spintronics applications.

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Tan, H., Zhang, Y., Zhao, Z. et al. Giant in-plane vibrational and transport anisotropy in van der Waals Ta2Ni3Te5. Sci. China Mater. (2024). https://doi.org/10.1007/s40843-023-2817-x

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