Disorder robustness and protection of Majorana bound states in ferromagnetic chains on conventional superconductors
Disorder robustness and protection of Majorana bound states in ferromagnetic chains on conventional superconductors
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DOI：
10.1103/physrevb.95.184511
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发表时间：
2017-05-17
影响因子：
3.7
通讯作者：
Black-Schaffer, Annica M.
中科院分区：
文献类型：
--
作者：
Awoga, Oladunjoye A.;Bjornson, Kristofer;Black-Schaffer, Annica M.
马约拉纳束缚态（MBSs）是建立在清洁限制的铁磁排列的杂质链沉积在传统的超导体与有限的自旋轨道耦合。在这里，我们表明，这些MBS是非常强大的对无序。通过自洽计算，我们发现，只要周围的超导体没有表现出大的不均匀性的迹象，MBSs的保护。我们还发现，较长的链提供了更多的稳定性，对混乱的MBSs，虽然小间隙减少，自旋轨道耦合和超导性的强度增加。
Majorana bound states (MBSs) are well established in the clean limit in chains of ferromagnetically aligned impurities deposited on conventional superconductors with finite spin-orbit coupling. Here we show that these MBSs are very robust against disorder. By performing self-consistent calculations we find that the MBSs are protected as long as the surrounding superconductor show no large signs of inhomogeneity. We also find that longer chains offer more stability against disorder for the MBSs, albeit the minigap decreases, as do increasing strengths of spin-orbit coupling and superconductivity.