OTBK理论中过电流的解析计算
Analytical calculation of the excess current in the OTBK theory
摘要：
我们提出了一个解析推导的过电流在约瑟夫森结内的Octavio-Tinkham-Blonder-Klapwijk理论的对称和非对称的势垒强度。我们证实了Flensberg等人在数值上发现的等势垒的结果[Phys.Rev.B38，8707（1988）]，包括低势垒时负过剩电流的预测，并将其推广到不同势垒。我们的分析公式提供了方便的拟合实验数据，也在较少的研究，但实际相关的情况下的障碍不对称。
英文摘要：
We present an analytical derivation of the excess current in Josephson junctions within the Octavio-Tinkham-Blonder-Klapwijk theory for both symmetric and asymmetric barrier strengths. We confirm the result found numerically by Flensberg et al. for equal barriers [Phys. Rev. B 38, 8707 (1988)], including the prediction of negative excess current for low transparencies, and we generalize it for differing barriers. Our analytical formulae provide for convenient fitting of experimental data, also in the less studied, but practically relevant case of the barrier asymmetry.
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