AI Article Synopsis
- The study uses scanning tunneling microscopy to investigate the electronic structure of the kagome Weyl antiferromagnet Mn₃Sn, revealing a unique resonance at the Fermi level similar to a Kondo resonance.
- This resonance originates from the intrinsic properties of the kagome lattice rather than from defects or impurities.
- It remains stable against magnetic field changes but widens with increased temperature, indicating significant interactions, and is explained through the kagome lattice Hubbard model, highlighting its many-body resonance behavior.
Article Abstract
We use scanning tunneling microscopy to elucidate the atomically resolved electronic structure in the strongly correlated kagome Weyl antiferromagnet Mn_{3}Sn. 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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| http://dx.doi.org/10.1103/PhysRevLett.125.046401 | DOI Listing |
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