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

Cheng ZJ, Belopolski I, Tien HJ, Cochran TA, Yang XP, Ma W, Yin JX, Chen D, Zhang J, Jozwiak C, Bostwick A, Rotenberg E, Cheng G, Hossain MS, Zhang Q, Litskevich M, Jiang YX, Yao N, Schroeter NBM, Strocov VN, Lian B, Felser C, Chang G, Jia S, Chang TR, Hasan MZ (2023)

Publication Type: Journal article

Publication year: 2023

Journal

Advanced Materials Wiley

Book Volume: 35

Article Number: 2205927

Journal Issue: 3

DOI: 10.1002/adma.202205927

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.

Involved external institutions

Princeton University US United States (USA) (US) National Cheng Kung University TW Taiwan (TW) Peking University (PKU) / 北京大学 CN China (CN) Lawrence Berkeley National Laboratory (LBNL) US United States (USA) (US) Paul Scherrer Institute (PSI) CH Switzerland (CH) Nanyang Technological University (NTU) SG Singapore (SG) Max-Planck-Institut für Chemische Physik fester Stoffe (MPI CPfS) / Max Planck Institute for Chemical Physics of Solids DE Germany (DE)

How to cite

APA:

Cheng, Z.-J., Belopolski, I., Tien, H.-J., Cochran, T.A., Yang, X.P., Ma, W.,... Hasan, M.Z. (2023). Visualization of Tunable Weyl Line in A–A Stacking Kagome Magnets. Advanced Materials, 35(3). https://dx.doi.org/10.1002/adma.202205927

MLA:

Cheng, Zi-Jia, et al. "Visualization of Tunable Weyl Line in A–A Stacking Kagome Magnets." Advanced Materials 35.3 (2023).

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