Dominant nonlocal superconducting proximity effect due to electron-electron interaction in a ballistic double nanowire
Dominant nonlocal superconducting proximity effect due to electron-electron interaction in a ballistic double nanowire
复制标题
弹道双纳米线中电子-电子相互作用导致的主要非局域超导邻近效应
DOI：
10.1126/sciadv.aaw2194
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发表时间：
2018-10
期刊：
影响因子：
13.6
通讯作者：
Seigo Tarucha
中科院分区：
文献类型：
--
作者：
Kento Ueda;Sadashige Matsuo;Hiroshi Kamata;Shoji Baba;Yosuke Sato;Yuusuke Takeshige;Kan Li;Soren Jeppesen;Lars Samuelson;Hongqi Xu;Seigo Tarucha
我们证明了在弹道双纳米线约瑟夫森结中占主导地位的库珀对分裂。库珀对分裂（CPS）可以在耦合到超导体的两个正常导体之间引起非局域关联。双一维电子气中的CPS是提取大量纠缠电子对的合适平台，并且是在没有磁场的情况下工程化马约拉纳费米子的关键成分之一。在这项研究中，我们研究了CPS通过使用约瑟夫森结的栅极可调弹道InAs双纳米线。测量到的两个纳米线的开关电流是显着大于相应的纳米线的开关电流的总和，表明线间超导性是占主导地位的相比，线内超导性。从其依赖于纳米线中的传播通道的数量，所观察到的CPS被分配到一维电子-电子相互作用。我们的研究结果将为利用一维电子-电子相互作用揭示高效CPS的物理机制以及通过CPS在双纳米线系统中设计Majorana费米子铺平道路。
We demonstrated dominant Cooper pair splitting in a ballistic double nanowire Josephson junction. Cooper pair splitting (CPS) can induce nonlocal correlation between two normal conductors that are coupled to a superconductor. CPS in a double one-dimensional electron gas is an appropriate platform for extracting a large number of entangled electron pairs and is one of the key ingredients for engineering Majorana fermions with no magnetic field. In this study, we investigated CPS by using a Josephson junction of a gate-tunable ballistic InAs double nanowire. The measured switching current into the two nanowires is significantly larger than the sum of the switching current into the respective nanowires, indicating that interwire superconductivity is dominant compared with intrawire superconductivity. From its dependence on the number of propagating channels in the nanowires, the observed CPS is assigned to one-dimensional electron-electron interaction. Our results will pave the way for the utilization of one-dimensional electron-electron interaction to reveal the physics of high-efficiency CPS and to engineer Majorana fermions in double nanowire systems via CPS.
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影响因子：
8.6
作者：
J. Klinovaja;D. Loss
通讯作者：
J. Klinovaja;D. Loss
影响因子：
4.6
作者：
Borzenets IV;Shimazaki Y;Jones GF;Craciun MF;Russo S;Yamamoto M;Tarucha S
通讯作者：
Tarucha S
影响因子：
8.6
作者：
KANE, CL;FISHER, MPA
通讯作者：
FISHER, MPA
基于纳米线的拓扑超导体-量子点混合器件中零偏置电导峰的奇偶独立性
影响因子：
4.6
作者：
Deng MT;Yu CL;Huang GY;Larsson M;Caroff P;Xu HQ
通讯作者：
Xu HQ
影响因子：
64.8
作者：
Hofstetter, L.;Csonka, S.;Schoenenberger, C.
通讯作者：
Schoenenberger, C.