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Edge-following topological states
Published 26 Aug 2019 in math-ph, cond-mat.mes-hall, math.KT, math.MP, and math.OA | (1908.09559v3)
Abstract: We prove that Chern insulators have topologically protected edge states which not only propagate unidirectionally along a straight line boundary, but also swerve around arbitrary-angled corners and geometric imperfections of the material boundary. This is a physical manifestation of the index theory of certain semigroup operator algebras.
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