Electrostatic effects and topological superconductivity in semiconductor–superconductor–magnetic-insulator hybrid wires
Electrostatic effects and topological superconductivity in semiconductor–superconductor–magnetic-insulator hybrid wires
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DOI：
10.1103/physrevb.104.195433
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发表时间：
2020-11
影响因子：
3.7
通讯作者：
B. Woods;T. Stanescu
中科院分区：
文献类型：
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作者：
B. Woods;T. Stanescu
研究了静电场对超导体-磁绝缘体混合结构中磁绝缘体和半导体导线之间邻近效应的影响。通过使用混合系统的有效模型进行自洽的薛定谔-泊松计算，我们发现大的有效塞曼场与拓扑超导性的出现相一致，出现在一个大的参数窗口内的磁性绝缘体和超导体的重叠层的导线，但不是在非重叠结构。我们表明，这种行为基本上是静电效应的结果，确定附近的超导磁绝缘体界面的低能量波函数的振幅。
We investigate the impact of electrostatics on the proximity effect between a magnetic insulator and a semiconductor wire in semiconductor-superconductor-magnetic insulator hybrid structures. By performing self-consistent Schr$\ddot{\rm o}$dinger-Poisson calculations using an effective model of the hybrid system, we find that large effective Zeeman fields consistent with the emergence of topological superconductivity emerge within a large parameter window in wires with overlapping layers of magnetic insulator and superconductor, but not in non-overlapping structures. We show that this behavior is essentially the result of electrostatic effects determining the amplitude of the low-energy wave functions near the semiconductor-magnetic insulator interface.