Chin. Phys. Lett.  2022, Vol. 39 Issue (11): 117101    DOI: 10.1088/0256-307X/39/11/117101
Evolution of Topological End States in the One-Dimensional Kondo–Heisenberg Model with Site Modulation
Neng Xie1, Danqing Hu1, Shu Chen1,2,3, and Yi-feng Yang1,2,3*
1Beijing National Laboratory for Condensed Matter Physics, and Institute of Physics, Chinese Academy of Sciences, Beijing 100190, China
2School of Physical Sciences, University of Chinese Academy of Sciences, Beijing 100190, China
3Songshan Lake Materials Laboratory, Dongguan 523808, China
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Neng Xie, Danqing Hu, Shu Chen et al  2022 Chin. Phys. Lett. 39 117101
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Abstract We investigate interplay of topological and Kondo effects in a one-dimensional Kondo–Heisenberg model with nontrivial conduction band using the density matrix renormalization group method. By analyzing the density profile, the local hybridization, and the spin/charge gap, we find that the Kondo effect can be destructed at edges of the chain by the topological end state below a finite critical Kondo coupling $J_{\scriptscriptstyle{\rm K}}^{\rm c}$. We construct a phase diagram characterizing the transition of the end states.
Received: 24 July 2022      Published: 24 October 2022
PACS:  71.27.+a (Strongly correlated electron systems; heavy fermions)  
  75.30.Mb (Valence fluctuation, Kondo lattice, and heavy-fermion phenomena)  
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Neng Xie
Danqing Hu
Shu Chen
and Yi-feng Yang
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