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arXiv · 2303.08483

Non-Hermitian skin effect induced by Rashba-Dresselhaus spin-orbit coupling

Pavel Kokhanchik·Dmitry Solnyshkov·Guillaume Malpuech
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Abstract

1D chains with non-reciprocal tunneling realizing the non-Hermitian skin effect (NHSE) have attracted considerable interest in the last years whereas their experimental realization in real space remains limited to a few examples. In this work, we propose a new generic way of implementing non-reciprocity based on a combination of the Rashba-Dresshlauss spin-orbit coupling, existing for electrons, cold atoms, and photons, and a lifetime imbalance between two spin components. We show that one can realize the Hatano-Nelson model, the non-Hermitian Su-Schrieffer-Heeger model, and even observe the NHSE in a 1D potential well without the need for a lattice. We further demonstrate the practical feasibility of this proposal by considering the specific example of a photonic liquid crystal microcavity. This platform allows one to switch on and off the NHSE by applying an external voltage to the microcavity.

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Pavel Kokhanchik, Dmitry Solnyshkov, Guillaume Malpuech. 2023-03-15. Non-Hermitian skin effect induced by Rashba-Dresselhaus spin-orbit coupling. https://doi.org/10.1103/physrevb.108.l041403

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