Many-body resonance in a correlated topological kagome antiferromagnet

Zhang, Songtian Sonia; Yin, Jia-Xin; Ikhlas, Muhammad; Tien, Hung-Ju; Wang, Rui; Shumiya, Nana; Chang, Guoqing; Tsirkin, Stepan S; Shi, Youguo; Yi, Changjiang; Guguchia, Zurab; Li, Hang; Wang, Wenhong; Chang, Tay-Rong; Wang, Ziqiang; Yang, Yi-feng; Neupert, Titus; Nakatsuji, Satoru; Hasan, M Zahid

doi:10.1103/physrevlett.125.046401

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Zhang, S. S., Yin, J.-X., Ikhlas, M., Tien, H.-J., Wang, R., Shumiya, N., Chang, G., Tsirkin, S. S., Shi, Y., Yi, C., Guguchia, Z., Li, H., Wang, W., Chang, T.-R., Wang, Z., Yang, Y., Neupert, T., Nakatsuji, S., & Hasan, M. Z. (2020). Many-body resonance in a correlated topological kagome antiferromagnet. Physical Review Letters, 125(4), 046401. https://doi.org/10.1103/physrevlett.125.046401

Abstract

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 magneti