Superconducting transport in single and parallel double InAs quantum dot Josephson junctions with Nb-based superconducting electrodes
Superconducting transport in single and parallel double InAs quantum dot Josephson junctions with Nb-based superconducting electrodes
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DOI：
10.1063/1.4936888
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发表时间：
2015-11-30
影响因子：
4
通讯作者：
Tarucha, Seigo
中科院分区：
文献类型：
--
作者：
Baba, Shoji;Sailer, Juergen;Tarucha, Seigo
我们报道了与Nb或NbTiN超导电极接触的InAs单量子点和平行双量子点约瑟夫森结的电导率和超电流测量。观察到大的超导间隙能、高临界场和大的开关电流，这些都反映了铌基电极的特点。对于平行双点，当两个点都处于共振状态时，我们观察到一个增强的超电流，这可能反映了分裂的库珀对隧道效应。(C) 2015 AIP出版有限责任公司
We report conductance and supercurrent measurements for InAs single and parallel double quantum dot Josephson junctions contacted with Nb or NbTiN superconducting electrodes. Large superconducting gap energy, high critical field, and large switching current are observed, all reflecting the features of Nb-based electrodes. For the parallel double dots, we observe an enhanced supercurrent when both dots are on resonance, which may reflect split Cooper pair tunneling. (C) 2015 AIP Publishing LLC.