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arXiv 0709.0371cond-mat.str-el
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部分嵌入超导体中的一维导线的接触电导

The contact conductance of a one-dimensional wire partly embedded in a superconductor

Raphael Matthews, Oded Agam

摘要:

研究了部分嵌入超导体电极中的半无限长一维导线的电导。当导线内的电子-电子相互作用是强排斥的时,导线有效地从超导体中分离出来。如果它们是中等或弱排斥性的,超导体的邻近在嵌入其中的导线段中诱导出超导有序,在这种情况下,随着温度的降低,电导表现出从导电到绝缘的交叉行为。这种转变的特征交叉温度对嵌入超导体中的导线部分的长度具有拉伸指数依赖性。这种拉伸的量由导线内电子相互作用的性质决定。

英文摘要:

The conductance through a semi-infinite one-dimensional wire, partly embedded in a superconducting bulk electrode, is studied. When the electron-electron interactions within the wire are strongly repulsive, the wire effectively decouples from the superconductor. If they are moderately or weakly repulsive, the proximity of the superconductor induces superconducting order in the segment of the wire embedded in it. In this case it is shown that the conductance exhibits a crossover from conductive to insulating behavior as the temperature is lowered down. The characteristic crossover temperature of this transition has a stretched exponential dependence on the length of the part of the wire embedded in the superconductor. The amount of this stretch is determined by the nature of the electron interactions within the wire.

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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