Interaction effects on proximity-induced superconductivity in semiconducting nanowires
Interaction effects on proximity-induced superconductivity in semiconducting nanowires
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DOI：
10.1103/physrevb.91.165425
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发表时间：
2015-04-23
影响因子：
3.7
通讯作者：
Flensberg, K.
中科院分区：
文献类型：
--
作者：
Danon, J.;Flensberg, K.
我们研究了一维纳米线中电子-电子相互作用对邻近诱导s波超导电性的影响。我们把相互作用的自洽平均场水平上，并找到一个有效的配对潜力的相互作用，有效的弱隧道耦合线的存在下，一个解析表达式。我们发现，对于一组的两个纳米线平行放置在超导衬底上，相互作用引起的配对能量的减少可能会导致有效的线间配对电位超过线内电位，这是在这样的双线系统中创建时间反演对称拓扑超导态的要求之一。
We investigate the effect of electron-electron interactions on proximity-induced s-wave superconductivity in one-dimensional nanowires. We treat the interactions on a self-consistent mean-field level, and find an analytic expression for the effective pairing potential in the presence of interactions, valid for a weakly tunnel coupled wire. We show that for a set of two nanowires placed in parallel on a superconducting substrate, the interaction-induced reduction of the pairing energy could result in the effective interwire pairing potential exceeding the intrawire potential, which is one of the requirements for creating a time-reversal symmetric topological superconducting state in such a two-wire system.