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

Zi Jia Cheng, Ilya Belopolski, Hung Ju Tien, Tyler A. Cochran, Xian P. Yang, Wenlong Ma, Jia Xin Yin, Dong Chen, Junyi Zhang, Chris Jozwiak, Aaron Bostwick, Eli Rotenberg, Guangming Cheng, Md Shafayat Hossain, Qi Zhang, Maksim Litskevich, Yu Xiao Jiang, Nan Yao, Niels B.M. Schroeter, Vladimir N. StrocovBiao Lian, Claudia Felser, Guoqing Chang, Shuang Jia, Tay Rong Chang, M. Zahid Hasan

Research output: Contribution to journalArticlepeer-review

2 Scopus citations

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.

Original languageEnglish (US)
Article number2205927
JournalAdvanced Materials
Volume35
Issue number3
DOIs
StatePublished - Jan 19 2023

All Science Journal Classification (ASJC) codes

  • Mechanics of Materials
  • Mechanical Engineering
  • General Materials Science

Keywords

  • ARPES
  • Kane–Mele
  • Weyl semimetal
  • kagome
  • spin–orbit coupling
  • tunability

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