Głodzik Szczepan, Domański Tadeusz
J Phys Condens Matter. 2020 May 27;32(23):235501. doi: 10.1088/1361-648X/ab786d.
We study in-gap states of a single magnetic impurity embedded in a honeycomb monolayer which is deposited on superconducting substrate. The intrinsic spin-orbit coupling induces the quantum spin Hall insulating (QSHI) phase gapped around the Fermi energy. Under such circumstances we consider the emergence of Shiba-like bound states driven by the superconducting proximity effect. We investigate their topography, spin-polarization and signatures of the quantum phase transition manifested by reversal of the local currents circulating around the magnetic impurity. These phenomena might be important for more exotic in-gap quasiparticles in such complex nanostructures as magnetic nanowires or islands, where the spin-orbit interaction along with the proximity induced electron pairing give rise to topological phases hosting the protected boundary modes.
我们研究了嵌入在沉积于超导衬底上的蜂窝状单层中的单个磁性杂质的能隙内态。本征自旋轨道耦合在费米能附近诱导出量子自旋霍尔绝缘（QSHI）相能隙。在这种情况下，我们考虑由超导邻近效应驱动的类芝田束缚态的出现。我们研究了它们的形貌、自旋极化以及由围绕磁性杂质循环的局部电流反转所表现出的量子相变特征。这些现象对于诸如磁性纳米线或岛等复杂纳米结构中更奇特的能隙内准粒子可能很重要，在这些结构中，自旋轨道相互作用与邻近诱导的电子配对共同产生了承载受保护边界模式的拓扑相。
