Non-Hermitian skin effect, as an important consequence of a non-Hermitian topological system, has recently attracted great attention. This paper reports an anomalous non-Hermitian skin effect, where the correspondence between skin modes and the non-zero winding number defined within point gaps can be broken, enabling further understanding of the non-Bloch band theory in the non-Hermitian field.
- Gang-Feng Guo
- Xi-Xi Bao
- Wu-Ming Liu
