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Topology from triviality

机译:琐碎的拓扑

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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.
机译:我们表明,使两个拓扑琐碎的系统接近可以带来一个拓扑阶段。更具体地说,我们研究了由二维超导衬底与s波和p波混合的一对一维金属纳米线,并通过分析和数字证明了这种设置的相图可以比以前报道的更丰富。因此,除了两个“预期的”众所周知的阶段(即,衬底和金属丝同时都是微不足道的或拓扑的)之外,我们表明存在两个奇特的阶段,其中纳米线可以处于拓扑状态,而衬底是微不足道的,反之亦然。

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  • 来源
    《Physical review》 |2018年第10期|104512.1-104512.12|共12页
  • 作者单位

    Institut de Physique Theorique. Universite Paris Saclay, CEA CNRS, Orme des Merisiers, 91190 Gif-sur-Yvette Cedex, France,Laboratoire de Physique des Solides, CNRS, Univ. Paris-Sud, Universite Paris-Saclay, 91405 Orsay Cedex, France,Department of Physics, KTH Royal Institute of Technology, Stockholm, SE-106 91 Sweden,Moscow Institute of Physics and Technology, Dolgoprudny 141700, Moscow region, Russia;

    Institut de Physique Theorique. Universite Paris Saclay, CEA CNRS, Orme des Merisiers, 91190 Gif-sur-Yvette Cedex, France;

    Laboratoire de Physique des Solides, CNRS, Univ. Paris-Sud, Universite Paris-Saclay, 91405 Orsay Cedex, France;

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