Cooper-pair splitting in two parallel InAs nanowires
Cooper-pair splitting in two parallel InAs nanowires
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DOI：
10.1088/1367-2630/aac74e
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发表时间：
2018-06-15
影响因子：
3.3
通讯作者：
Tarucha, S.
中科院分区：
文献类型：
--
作者：
Baba, S.;Junger, C.;Tarucha, S.
我们报告的InAs双纳米线（NW）设备的制造和电气特性的两个紧密放置的平行的NW耦合到一个共同的超导电极的一侧和个人正常的金属引线上的其他组成。在这种新型的设备中，我们检测库珀对分裂（CPS）的相关电流在两个纳米线的相当大的效率。在早期的实验中，CPS是实现在一个单一的NW，展示了由超导体（SC）介导的线内电子配对，我们的实验表明，由共同的SC介导的线间相互作用。后者是实现零磁场马约拉纳束缚态，或Parafermions的关键;在NW，因此构成了一个里程碑拓扑超导性。此外，我们观察到只发生在超导状态，我们暂时属性Andreev束缚态和/或Yu-Shiba共振，形成在一个NW的邻近部分的运输共振。
We report on the fabrication and electrical characterization of an InAs double-nanowire (NW) device consisting of two closely placed parallel NWs coupled to a common superconducting electrode on one side and individual normal metal leads on the other. In this new type of device we detect Cooper-pair splitting (CPS) with a sizeable efficiency of correlated currents in both NWs. In contrast to earlier experiments, where CPS was realized in a single NW, demonstrating an intrawire electron pairing mediated by the superconductor (SC), our experiment demonstrates an interwire interaction mediated by the common SC. The latter is the key for the realization of zero-magnetic field Majorana bound states, or Parafermions; in NWs and therefore constitutes a milestone towards topological superconductivity. In addition, we observe transport resonances that occur only in the superconducting state, which we tentatively attribute to Andreev bound states and/or Yu-Shiba resonances that form in the proximitized section of one NW.