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arXiv 2005.02314cond-mat.mes-hallcond-mat.mtrl-scicond-mat.supr-con
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透明范德华超导体-金属结中的超导邻近效应

Superconducting proximity effect in a transparent van der Waals superconductor-metal junction

Jing Li, Han-Bing Leng, Hailong Fu, Kenji Watanabe, Takashi Taniguchi, Xin Liu, Chao-Xing Liu, Jun Zhu

摘要:

我们报告在清洁NbSe 2双层石墨烯结的Andreev反射。结的高透明度,表现为高达1.8的大电导增强,使我们能够看到双层石墨烯中的邻近诱导的超导能隙和分别通过垂直NbSe 2-石墨烯和横向石墨烯-石墨烯结的两个Andreev反射的清楚证据。量子输运模拟捕捉到了实验数据的复杂性,并阐明了各种微观参数对结传输的影响。我们的工作建立了一个全范德华,高性能超导结的实践和理解。高度透明的接近石墨烯-石墨烯结的实现开辟了工程量子现象的可能性。

英文摘要:

We report on Andreev reflections at clean NbSe2-bilayer graphene junctions. The high transparency of the junction, which manifests as a large conductance enhancement of up to 1.8, enables us to see clear evidence of a proximity-induced superconducting gap in bilayer graphene and two Andreev reflections through a vertical NbSe2-graphene and a lateral graphene-graphene junction respectively. Quantum transport simulations capture the complexity of the experimental data and illuminate the impact of various microscopic parameters on the transmission of the junction. Our work establishes the practice and understanding of an all-van-der-Waals, high-performance superconducting junction. The realization of a highly transparent proximized graphene-graphene junction opens up possibilities to engineer emergent quantum phenomena.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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