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Topology from triviality

Abstract : We show that bringing into proximity two topologically trivial systems can give rise to a topological phase. More specifically, we study a 1D metallic nanowire proximitized by a 2D superconducting substrate with a mixed s-wave and p-wave pairing, and we demonstrate both analytically and numerically that the phase diagram of such a setup can be richer than reported before. Thus, apart from the two "expected" well-known phases (i.e., where the substrate and the wire are both simultaneously trivial or topological), we show that there exist two peculiar phases in which the nanowire can be in a topological regime while the substrate is trivial, and vice versa.
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Submitted on : Monday, April 12, 2021 - 3:16:27 PM
Last modification on : Tuesday, January 4, 2022 - 4:41:32 AM
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V. Kaladzhyan, Cristina Bena, Pascal Simon. Topology from triviality. Physical Review B, American Physical Society, 2018, 97 (10), pp.104512. ⟨10.1103/PhysRevB.97.104512⟩. ⟨cea-03196169⟩



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