Year: 2024
Type: article
Abstract: The interplay of topology, magnetism, and correlations gives rise to intriguing phases of matter. In this study, through state-of-the-art angle-resolved photoemission spectroscopy, density functional theory, and dynamical mean-field theory calculations, we visualize a fourfold degenerate Dirac nodal line at the boundary of the bulk Brillouin zone in the antiferromagnet YMn2Ge2. We further demonstrate that this gapless, antiferromagnetic Dirac nodal line is enforced by the combination of magnetism, space-time inversion symmetry, and nonsymmorphic lattice symmetry. The corresponding drumhead surface states traverse the whole surface Brillouin zone. YMn2Ge2 thus serves as a platform to exhibit the interplay of multiple degenerate nodal physics and antiferromagnetism. Interestingly, the magnetic nodal line displays a d-orbital dependent renormalization along its trajectory in momentum space, thereby manifesting Hund’s coupling. Our findings offer insights into the effect of electronic correlations on magnetic Dirac nodal lines, leading to an antiferromagnetic Hund nodal line. The interplay of magnetism, various symmetries and correlations can lead to intriguing physics in the solid state. Here, the authors report signatures of a Hund nodal line in the antiferromagnet YMn2Ge2.
Source: Nature Communications
Authors: Xian P. Yang, Yueh-Ting Yao, Pengyu Zheng, Shuyue Guan, Huibin Zhou, Tyler A. Cochran, Che-Min Lin, Jia-Xin Yin, Xiaoting Zhou, Zi-Jia Cheng, Zhaohu Li, Tong Shi, Md Shafayat Hossain, Shengwei Chi, Ilya Belopolski, Yu-Xiao Jiang, Maksim Litskevich, Gang Xu, Zhaoming Tian, Arun Bansil, Zhiping Yin, Shuang Jia, Tay-Rong Chang, M. Zahid Hasan
Institutions: Princeton University, National Cheng Kung University, Beijing Normal University, Peking University, Southern University of Science and Technology, Northeastern University, Huazhong University of Science and Technology, Wuhan Institute of Quantum Technology, University of Chinese Academy of Sciences, National Center for Theoretical Sciences, National Center for Theoretical Sciences, Physics Division, Lawrence Berkeley National Laboratory
Language: English
Subfield: Atomic and Molecular Physics, and Optics
Field: Physics and Astronomy
Domain: Physical Sciences
Open Access status: gold
Estimated APC paid: $6,790
Funders: National Science Foundation, U.S. Department of Energy, Gordon and Betty Moore Foundation, Princeton University, Adolph C. and Mary Sprague Miller Institute for Basic Research in Science, University of California Berkeley, National Center for Theoretical Sciences, National Applied Research Laboratories, National Natural Science Foundation of China, VINNOVA, Svenska Forskningsrådet Formas, Chinese Academy of Sciences, Beijing Normal University, Huazhong University of Science and Technology, Vetenskapsrådet, National Cheng Kung University, Peking University, National Science and Technology Council, Office of Science, RIKEN, National Key Research and Development Program of China, Fundamental Research Funds for the Central Universities, Basic and Applied Basic Research Foundation of Guangdong Province, Basic Energy Sciences, Air Force Office of Scientific Research, Oak Ridge National Laboratory, Brookhaven National Laboratory, Lawrence Berkeley National Laboratory, SLAC National Accelerator Laboratory
Awards: G1014846411, G1079818582, G1143651532, G1201043483, G1229526393, G1285306620, G1286236842, G1286251239, G1451874870, G1502940113, G1523888516, G1769256354, G1769437453, G1847291448, G1863003419, G2013908898, 拓扑半金属的理论和计算研究, G208125138, G2371548206, G241279073, G2416988458, G2449110504, G2485993052, G262532246, G2735571122, SYNCHOTRON X-RAY BASED ELECTRONIC STRUCTURE STUDY OF CORRELATED QUANTUM MATERIALS, G28403681, 强关联拓扑材料的理论研究和计算设计, G303061748, G3031809386, G3059794839, G30714459, G3083819904, G3112650096, G3114243037, G3137197751, G317939215, G3262563802, G3310577945, G357145406, G36446433, G3728818118, G3884951186, G4008846448, G419881185, G4235786860, Graduate Research Fellowship Program (GRFP), G42916606, G4332558100, G4473368111, G4501827968, G495301720, G498139845, G507888039, G5096929151, MAX IV operations – Formas, G5224014036, G5229471624, G5473946529, G5570207115, G5729145195, G5765906131, G594270511, G5958906545, 强磁场下烧绿石铱氧化物新奇量子态的调控和反常物性研究, G6213918008, G6420049844, G650090426, G6550344761, G660579501, M. Zahid Hasan Experimental Investigator in Quantum Materials Award, G6795672537, G6965541988, G704498496, G712881263, G7283024673, G7354628648, G7463374569, G8087589307, MAX IV operations 2019-2021, G8275184211, G8382000481, M. Zahid Hasan Experimental Investigator Award, G872144517, G8743869579, G9000170913, G911061179, G920057190, G94368673, G969889393
OpenAlex ID: W4401605455