Su-Schrieffer-Heeger model with imaginary gauge field
Abstract
We consider Su-Schrieffer-Heeger (SSH) model in the presence of an imaginary gauge field. This model is non-Hermitian and has chiral symmetry. We investigate the influence of non-Hermiticity parameter on topologically trivial and nontrivial phases. We find topological edge states with real energy spectrum and obtain the topological invariant of the system.
- Publication:
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Physics Letters A
- Pub Date:
- May 2019
- DOI:
- 10.1016/j.physleta.2019.02.037
- Bibcode:
- 2019PhLA..383.1821O
- Keywords:
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- SSH model;
- Edge sates;
- Non-Hermitian skin effect;
- Winding number