期刊
PHYSICAL REVIEW LETTERS
卷 125, 期 4, 页码 -出版社
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevLett.125.046401
关键词
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资金
- Gordon and Betty Moore Foundation [GBMF4547, GBMF9461/Hasan]
- U.S. Department of Energy (U.S. DOE) under the Basic Energy Sciences program [DOE/BES DE-FG02-05ER46200]
- European Union's Horizon 2020 research and innovation programme [ERC-StG-Neupert-757867PARATOP]
- NCRR Marvel
- MOST Young Scholar Fellowship (MOST Grant for the Columbus Program ) [107-2636M-006-004-]
- National Cheng Kung University, Taiwan
- National Center for Theoretical Sciences (NCTS), Taiwan
- U.S. Department of Energy, Basic Energy Sciences [DE-FG0299ER45747]
- CREST, Japan Science and Technology Agency [JPMJCR18T3]
- Ministry of Education, Culture, Sports, Science, and Technology of Japan [15H05882, 15H05883]
- Japanese Society for the Promotion of Science (JSPS) [19H00650]
- Lawrence Berkeley National Laboratory at the University of California, Berkeley
- Miller Institute of Basic Research in Science at the University of California, Berkeley
- National Key Research and Development Program of China [2017YFA0302901]
We use scanning tunneling microscopy to elucidate the atomically resolved electronic structure in the strongly correlated kagome Weyl antiferromagnet Mn3Sn. In stark contrast to its broad single-particle electronic structure, we observe a pronounced resonance with a Fano line shape at the Fermi level resembling the many-body Kondo resonance. We find that this resonance does not arise from the step edges or atomic impurities but the intrinsic kagome lattice. Moreover, the resonance is robust against the perturbation of a vector magnetic field, but broadens substantially with increasing temperature, signaling strongly interacting physics. We show that this resonance can be understood as the result of geometrical frustration and strong correlation based on the kagome lattice Hubbard model. Our results point to the emergent many-body resonance behavior in a topological kagome magnet.
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