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- W3067862563 abstract "The skin effect and topological edge states in non-Hermitian system have been well-studied, and the second-order skin effect and corner modes have also been proposed in non-Hermitian system recently. In this paper, we construct the nested tight-binding formalism to research the second-order corner modes analytically, which is a direct description of the generic non-Hermitian tight-binding model without other assumptions. Within this formalism, we obtain the exact solutions of second-order topological zero-energy corner modes for the non-Hermitian four-band model. We validate the nested tight-binding formalism in the hybrid skin-topological corner modes for the four-band model and a non-Hermitian two-dimensional (2D) extrinsic model. In addition, we exactly illustrate the corner modes induced by second-order skin effect for a simplest 2D non-Hermitian model by the nested tight-binding formalism." @default.
- W3067862563 created "2020-08-24" @default.
- W3067862563 creator A5046690397 @default.
- W3067862563 creator A5069980101 @default.
- W3067862563 creator A5080365744 @default.
- W3067862563 date "2021-01-19" @default.
- W3067862563 modified "2023-10-06" @default.
- W3067862563 title "Non-Hermitian second-order skin and topological modes" @default.
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- W3067862563 doi "https://doi.org/10.1103/physrevb.103.045420" @default.