Tuning the proximity effect in a superconductor-graphene-superconductor junction
Tuning the proximity effect in a superconductor-graphene-superconductor junction
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DOI：
10.1103/physrevb.79.165436
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发表时间：
2009-04-01
影响因子：
3.7
通讯作者：
Bouchiat, H.
中科院分区：
文献类型：
--
作者：
Ojeda-Aristizabal, C.;Ferrier, M.;Bouchiat, H.
我们已经在原位调谐的邻近效应在一个单一的石墨烯层耦合到两个Pt/Ta超导电极。通过器件的退火电流改变了电极/石墨烯界面的透射系数，增加了多次Andreev反射的可能性。重复的退火步骤改善了接触，足以在石墨烯中诱导约瑟夫森电流。
We have tuned in situ the proximity effect in a single graphene layer coupled to two Pt/Ta superconducting electrodes. An annealing current through the device changed the transmission coefficient of the electrode/graphene interface, increasing the probability of multiple Andreev reflections. Repeated annealing steps improved the contact sufficiently for a Josephson current to be induced in graphene.