文章基本信息

标题：Tuning Locality of Pair Coherence in Graphene-based Andreev Interferometers
本地全文：下载
作者：Minsoo Kim ; Dongchan Jeong ; Gil-Ho Lee 等
期刊名称：Scientific Reports
电子版ISSN：2045-2322
出版年度：2015
卷号：5
期号：1
DOI：10.1038/srep08715
语种：English
出版社：Springer Nature
摘要：We report on gate-tuned locality of superconductivity-induced phase-coherent magnetoconductance oscillations in a graphene-based Andreev interferometer, consisting of a T-shaped graphene bar in contact with a superconducting Al loop. The conductance oscillations arose from the flux change through the superconducting Al loop, with gate-dependent Fraunhofer-type modulation of the envelope. We confirm a transitional change in the character of the pair coherence, between local and nonlocal, in the same device as the effective length-to-width ratio of the device was modulated by tuning the pair-coherence length ξ_T in the graphene layer.