Introduces a non-Bloch winding number on a generalized Brillouin zone to predict and control boundary-localized magnon modes in an antiferromagnetic chain where conventional bulk-boundary correspondence fails.
Yang, Non-perturbative breakdown of Bloch’s theo- rem and Hermitian skin effects (2020), arXiv:2012.03333 [cond-mat.mes-hall]
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Non-Bloch band theory of boundary-controlled magnon edge modes in an antiferromagnetic chain
Introduces a non-Bloch winding number on a generalized Brillouin zone to predict and control boundary-localized magnon modes in an antiferromagnetic chain where conventional bulk-boundary correspondence fails.