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

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, Xingjiang Zhou, Guangtong Liu, Fanming Qu, Tian Qian, Youguo Shi*Zhijun Wang*, Li Lu*, Jie Shen*

*此作品的通讯作者

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摘要

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.

源语言英语
文章编号7647
期刊Nature Communications
14
1
DOI
出版状态已出版 - 12月 2023

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Wang, A., Li, Y., Yang, G., Yan, D., Huang, Y., Guo, Z., Gao, J., Huang, J., Zeng, Q., Qian, D., Wang, H., Guo, X., Meng, F., Zhang, Q., Gu, L., Zhou, X., Liu, G., Qu, F., Qian, T., ... Shen, J. (2023). A robust and tunable Luttinger liquid in correlated edge of transition-metal second-order topological insulator Ta2Pd3Te5. Nature Communications, 14(1), 文章 7647. https://doi.org/10.1038/s41467-023-43361-5