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A robust and tunable Luttinger liquid in correlated edge of transition-metal second-order topological insulator Ta2Pd3Te5

Author

Listed:
  • Anqi Wang

    (Chinese Academy of Sciences
    University of Chinese Academy of Sciences)

  • Yupeng Li

    (Chinese Academy of Sciences)

  • Guang Yang

    (Chinese Academy of Sciences)

  • Dayu Yan

    (Chinese Academy of Sciences)

  • Yuan Huang

    (Beijing Institute of Technology)

  • Zhaopeng Guo

    (Chinese Academy of Sciences)

  • Jiacheng Gao

    (Chinese Academy of Sciences
    University of Chinese Academy of Sciences)

  • Jierui Huang

    (Chinese Academy of Sciences
    University of Chinese Academy of Sciences)

  • Qiaochu Zeng

    (Chinese Academy of Sciences)

  • Degui Qian

    (Chinese Academy of Sciences)

  • Hao Wang

    (Chinese Academy of Sciences)

  • Xingchen Guo

    (Chinese Academy of Sciences
    University of Chinese Academy of Sciences)

  • Fanqi Meng

    (Chinese Academy of Sciences)

  • Qinghua Zhang

    (Chinese Academy of Sciences
    Yangtze River Delta Physics Research Center Co. Ltd)

  • Lin Gu

    (Chinese Academy of Sciences
    University of Chinese Academy of Sciences
    Songshan Lake Materials Laboratory)

  • Xingjiang Zhou

    (Chinese Academy of Sciences
    University of Chinese Academy of Sciences
    Songshan Lake Materials Laboratory)

  • Guangtong Liu

    (Chinese Academy of Sciences
    Songshan Lake Materials Laboratory)

  • Fanming Qu

    (Chinese Academy of Sciences
    University of Chinese Academy of Sciences
    Songshan Lake Materials Laboratory)

  • Tian Qian

    (Chinese Academy of Sciences
    Songshan Lake Materials Laboratory)

  • Youguo Shi

    (Chinese Academy of Sciences
    University of Chinese Academy of Sciences
    Songshan Lake Materials Laboratory)

  • Zhijun Wang

    (Chinese Academy of Sciences
    University of Chinese Academy of Sciences)

  • Li Lu

    (Chinese Academy of Sciences
    University of Chinese Academy of Sciences
    Songshan Lake Materials Laboratory)

  • Jie Shen

    (Chinese Academy of Sciences
    Songshan Lake Materials Laboratory)

Abstract

The interplay between topology and interaction always plays an important role in condensed matter physics and induces many exotic quantum phases, while rare transition metal layered material (TMLM) has been proved to possess both. Here we report a TMLM Ta2Pd3Te5 has the two-dimensional second-order topology (also a quadrupole topological insulator) with correlated edge states - Luttinger liquid. It is ascribed to the unconventional nature of the mismatch between charge- and atomic- centers induced by a remarkable double-band inversion. This one-dimensional protected edge state preserves the Luttinger liquid behavior with robustness and universality in scale from micro- to macro- size, leading to a significant anisotropic electrical transport through two-dimensional sides of bulk materials. Moreover, the bulk gap can be modulated by the thickness, resulting in an extensive-range phase diagram for Luttinger liquid. These provide an attractive model to study the interaction and quantum phases in correlated topological systems.

Suggested Citation

  • Anqi Wang & Yupeng Li & Guang Yang & Dayu Yan & Yuan Huang & Zhaopeng Guo & Jiacheng Gao & Jierui Huang & Qiaochu Zeng & Degui Qian & Hao Wang & Xingchen Guo & Fanqi Meng & Qinghua Zhang & Lin Gu & Xi, 2023. "A robust and tunable Luttinger liquid in correlated edge of transition-metal second-order topological insulator Ta2Pd3Te5," Nature Communications, Nature, vol. 14(1), pages 1-10, December.
    • Handle: RePEc:nat:natcom:v:14:y:2023:i:1:d:10.1038_s41467-023-43361-5
    DOI: 10.1038/s41467-023-43361-5
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