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arXiv 0903.2237cond-mat.supr-concond-mat.str-el
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具有Andreev反射的正常窄带超导结中的负微分电阻

Negative differential resistance in normal narrow bands - superconducting junctions with Andreev reflection

N. García, P. Esquinazi

摘要:

我们计算了具有Andreev反射和不同电子带类型的正常超导结的电流-电压特性曲线。我们发现,当正常带是窄的,超导能隙的数量级,一个负微分电阻出现在一个电压的数量级的带宽加上间隙值。在两个带对总电流有贡献的情况下,在高于间隙值的电压下,电导可以小于1。我们的模拟可能会提供一个答案,不同的实验数据的文献,尚未理解。

英文摘要:

We have calculated current-voltage characteristic curves for normal-superconducting junctions with Andreev reflections and different types of electronic bands. We found that when the normal band is narrow, of the order of the superconducting energy gap, a negative differential resistance appears at a voltage of the order of the band width plus the gap value. In case two bands contribute to the total current the conductance can be smaller than unity at voltages above the gap value. Our simulations may provide an answer to different experimental data of the literature that were not yet understood.

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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