Dimerization-induced mobility edges and multiple reentrant localization transitions in non-Hermitian quasicrystals

نویسندگان

چکیده

Non-Hermitian effects could create rich dynamical and topological phase structures. In this work, we show that the collaboration between lattice dimerization non-Hermiticity generally bring about mobility edges multiple localization transitions in one-dimensional quasicrystals. extensions of Aubry-Andr\'e-Harper model with staggered on-site potential dimerized hopping amplitudes are introduced to demonstrate our results. Reentrant due interplay quasiperiodic gain/loss found. Quantized winding numbers further adopted as invariants characterize among phases distinct spectrum transport nature. Our study thus enriches family non-Hermitian quasicrystals by incorporating dimerization, offering a convenient way modulate systems.

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ژورنال

عنوان ژورنال: Physical review

سال: 2022

ISSN: ['0556-2813', '1538-4497', '1089-490X']

DOI: https://doi.org/10.1103/physrevb.105.054204