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Boundary modes of a charge density wave state in a topological material

https://doi.org/10.1038/s41567-024-02469-1

Litskevich, Maksim; Hossain, Md Shafayat; Zhang, Song-Bo; Cheng, Zi-Jia; Guin, Satya N; Kumar, Nitesh; Shekhar, Chandra; Wang, Zhiwei; Li, Yongkai; Chang, Guoqing; et al (August 2024, Nature Physics)

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Quantum transport response of topological hinge modes

https://doi.org/10.1038/s41567-024-02388-1

Hossain, Md Shafayat; Zhang, Qi; Wang, Zhiwei; Dhale, Nikhil; Liu, Wenhao; Litskevich, Maksim; Casas, Brian; Shumiya, Nana; Yin, Jia-Xin; Cochran, Tyler A; et al (May 2024, Nature Physics)

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Evidence of a room-temperature quantum spin Hall edge state in a higher-order topological insulator

https://doi.org/10.1038/s41563-022-01304-3

Shumiya, Nana; Hossain, Md Shafayat; Yin, Jia-Xin; Wang, Zhiwei; Litskevich, Maksim; Yoon, Chiho; Li, Yongkai; Yang, Ying; Jiang, Yu-Xiao; Cheng, Guangming; et al (October 2022, Nature Materials)

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Visualizing the out-of-plane electronic dispersions in an intercalated transition metal dichalcogenide

https://doi.org/10.1103/PhysRevB.105.L121107

Yang, Xian P.; LaBollita, Harrison; Cheng, Zi-Jia; Bhandari, Hari; Cochran, Tyler A.; Yin, Jia-Xin; Hossain, Md. Shafayat; Belopolski, Ilya; Zhang, Qi; Jiang, Yuxiao; et al (March 2022, Physical Review B)

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Signatures of Weyl Fermion Annihilation in a Correlated Kagome Magnet

https://doi.org/10.1103/PhysRevLett.127.256403

Belopolski, Ilya; Cochran, Tyler A.; Liu, Xiaoxiong; Cheng, Zi-Jia; Yang, Xian P.; Guguchia, Zurab; Tsirkin, Stepan S.; Yin, Jia-Xin; Vir, Praveen; Thakur, Gohil S.; et al (December 2021, Physical Review Letters)

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Visualization of Tunable Weyl Line in A–A Stacking Kagome Magnets

https://doi.org/10.1002/adma.202205927

Cheng, Zi‐Jia; Belopolski, Ilya; Tien, Hung‐Ju; Cochran, Tyler_A; Yang, Xian_P; Ma, Wenlong; Yin, Jia‐Xin; Chen, Dong; Zhang, Junyi; Jozwiak, Chris; et al (December 2022, Advanced Materials)

Abstract Kagome magnets provide a fascinating platform for a plethora of topological quantum phenomena, in which the delicate interplay between frustrated crystal structure, magnetization, and spin–orbit coupling (SOC) can engender highly tunable topological states. Here, utilizing angle‐resolved photoemission spectroscopy, the Weyl lines are directly visualized with strong out‐of‐plane dispersion in the A–A stacked kagome magnet GdMn₆Sn₆. Remarkably, the Weyl lines exhibit a strong magnetization‐direction‐tunable SOC gap and binding energy tunability after substituting Gd with Tb and Li, respectively. These results not only illustrate the magnetization direction and valence counting as efficient tuning knobs for realizing and controlling distinct 3D topological phases, but also demonstrate AMn₆Sn₆(A = rare earth, or Li, Mg, or Ca) as a versatile material family for exploring diverse emergent topological quantum responses.
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