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Majorana bound state localization and energy oscillations for magnetic impurity chains on conventional superconductors

机译:常规超导体上磁杂质链的Majorana绑定状态和能量振荡

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摘要

We study a chain of magnetic impurities on a conventional superconductor with spin-orbit coupling, treating the superconducting order fully self-consistently. We find and quantify strong hybridization between the topological edge Majorana bound states (MBSs) and in-gap Yu-Shiba-Rusinov (YSR) states, which causes increasing energy oscillations as a function of magnetic impurity strength, even when the direct MBS overlap is negligible. By treating the MBS as a topological boundary state, dependent only on the effective mass gap, we arrive at a fully parameter-free functional form of its localization that decreases with magnetic impurity strength, opposite to the behavior of the superconducting coherence length.
机译:我们研究了传统超导体的磁性杂质链,具有旋转轨道耦合,完全自持续地处理超导顺序。我们发现并量化拓扑边缘Majorana绑定状态(MBSS)和间隙内yu-Shiba-Rusinov(YSR)状态之间的强烈杂交,这导致能量振荡随着磁杂质强度的函数而导致的,即使直接MB重叠也是如此微不足道。通过将MBS作为拓扑边界状态处理,仅取决于有效质量差距,我们以完全可参与的功能形式的本地化,其定位以磁杂质强度降低,与超导相干长度的行为相反。

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  • 来源
    《Physical review》 |2019年第21期|214504.1-214504.7|共7页
  • 作者单位

    Uppsala Univ Dept Phys & Astron Box 516 SE-75120 Uppsala Sweden;

    Uppsala Univ Dept Phys & Astron Box 516 SE-75120 Uppsala Sweden|Univ Copenhagen Niels Bohr Inst Juliane Maries Veg 30 DK-2100 Copenhagen Denmark;

    Uppsala Univ Dept Phys & Astron Box 516 SE-75120 Uppsala Sweden;

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