Proximity-induced superconductivity in two-dimensional electronic systems
Proximity-induced superconductivity in two-dimensional electronic systems
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DOI：
10.1103/physrevb.84.064524
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发表时间：
2011-08-25
影响因子：
3.7
通讯作者：
Melnikov, A. S.
中科院分区：
文献类型：
--
作者：
Kopnin, N. B.;Melnikov, A. S.
发展了适用于低维电子系统中与诱导超导性相关的空间非均匀和时间相关问题的方法。这种方法是基于Fano-Anderson模型，该模型描述了耦合到连续体的共振态的衰减。我们考虑两种类型的结弹道二维电子气放置在隧道有限长接触散装超导导线。我们计算了束缚态、超电流和电流-电压曲线的光谱，由于诱导能隙和维度量子化的存在，它们显示出丰富的结构。
The approach applicable for spatially inhomogeneous and time-dependent problems associated with the induced superconductivity in low-dimensional electronic systems is developed. This approach is based on the Fano-Anderson model which describes the decay of a resonance state coupled to a continuum. We consider two types of junctions made of a ballistic two-dimensional electron gas placed in a tunnel finite-length contact with a bulk superconducting leads. We calculate the spectrum of the bound states, supercurrent, and the current-voltage curve which show a rich structure due to the presence of induced gap and dimensional quantization.