@article{65f84393cfe143d99cab0ee6713a19af,
title = "Visualization of Tunable Weyl Line in A–A Stacking Kagome Magnets",
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.",
keywords = "ARPES, kagome, Kane–Mele, spin–orbit coupling, tunability, Weyl semimetal",
author = "Cheng, {Zi Jia} and Ilya Belopolski and Tien, {Hung Ju} and Cochran, {Tyler A.} and Yang, {Xian P.} and Wenlong Ma and Yin, {Jia Xin} and Dong Chen and Junyi Zhang and Chris Jozwiak and Aaron Bostwick and Eli Rotenberg and Guangming Cheng and Hossain, {Md Shafayat} and Qi Zhang and Maksim Litskevich and Jiang, {Yu Xiao} and Nan Yao and Schroeter, {Niels B.M.} and Strocov, {Vladimir N.} and Biao Lian and Claudia Felser and Guoqing Chang and Shuang Jia and Chang, {Tay Rong} and Hasan, {M. Zahid}",
note = "Funding Information: Z.‐J.C., I.B., H.J.T., T.A.C., and X.P.Y. contributed equally to this work. The authors thank Jiabin Yu and Yuanfeng Xu for fruitful discussions. The material characterization (ARPES) is supported by the United States Department of Energy (US DOE) under the Basic Energy Sciences program (Grant No. DOE/BES DE‐FG‐02‐05ER46200). This research used resources of the Advanced Light Source (ALS), a DOE Office of Science User Facility under contract number DE‐AC02‐05CH11231. Use of the Stanford Synchrotron Radiation Light Source (SSRL), SLAC National Accelerator Laboratory, is supported by the U.S. Department of Energy, Office of Science, Office of Basic Energy Sciences, under contract no. DE‐AC02‐76SF00515. The authors acknowledge the Paul Scherrer Institut, Villigen, Switzerland, for provision of synchrotron radiation beamtime at the ADRESS beamline of the Swiss Light Source. The authors thank Donghui Lu and Makoto Hashimoto at Beamline 5.2 of the SSRL for support. The authors thank C. Polley, J. Adell, and B. Thiagarajan at Beamline Bloch of the Max IV, Lund, Sweden, for support. The authors also want to thank J. Denlinger at Beamline 4.0.3 (MERLIN) of the ALS for support in getting the preliminary data. The authors also acknowledge the use of Princeton University's Imaging and Analysis Center, which is partially supported by the Princeton Center for Complex Materials (PCCM), a National Science Foundation (NSF)‐MRSEC program (DMR‐2011750). I.B. acknowledges the generous support of the Special Postdoctoral Researchers Program, RIKEN during the late stages of this work. T.A.C. acknowledges the support of the National Science Foundation Graduate Research Fellowship Program (DGE‐1656466). B.L. is supported by the Alfred P. Sloan Foundation, the National Science Foundation through Princeton University's Materials Research Science and Engineering Center (DMR‐2011750), and the National Science Foundation under award DMR‐2141966. G.C. would like to acknowledge the support of the National Research Foundation, Singapore, under its NRF Fellowship Award (NRF‐NRFF13‐2021‐0010), and the Nanyang Assistant Professorship grant from Nanyang Technological University. T.‐R.C. was supported by the 2030 Cross‐Generation Young Scholars Program from the National Science and Technology Council (NSTC) in Taiwan (Program No. MOST111‐2628‐M‐006‐003‐MY3), National Cheng Kung University (NCKU), Taiwan, and National Center for Theoretical Sciences, Taiwan. This research was supported, in part, by Higher Education Sprout Project, Ministry of Education to the Headquarters of University Advancement at NCKU. The work in Peking University was supported by CAS Interdisciplinary Innovation Team, the strategic Priority Research Program of Chinese Academy of Sciences (Grant No. XDB28000000), and the National Natural Science Foundation of China (Grant Nos. 12141002 and 12225401). N.B.M.S. was partially supported by Microsoft. The work was also supported partially by the European Research Council (ERC Advanced Grant No. 742068 “TOPMAT”), the DFG through SFB 1143 (Project ID. 247310070), and the W{\"u}rzburg‐Dresden Cluster of Excellence on Complexity and Topology in Quantum Matter ct.qmat (EXC2147, Project ID. 390858490). M.Z.H. acknowledges the support from Lawrence Berkeley National Laboratory and the Miller Institute of Basic Research in Science at the University of California, Berkeley, in the form of a Visiting Miller Professorship during the early stage of this work. Publisher Copyright: {\textcopyright} 2022 Wiley-VCH GmbH.",
year = "2022",
doi = "10.1002/adma.202205927",
language = "English (US)",
journal = "Advanced Materials",
issn = "0935-9648",
publisher = "Wiley-VCH Verlag",
}