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Critical Josephson current through a bistable single-molecule junction

机译:通过双稳态单分子结的临界约瑟夫森电流

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摘要

We compute the critical Josephson current through a single-molecule junction. As a model for a molecule with a bistable conformational degree of freedom, we study an interacting single-level quantum dot coupled to a two-level system and weakly connected to two superconducting electrodes. We perform a lowest-order perturbative calculation of the critical current and show that it can significantly change due to the two-level system. In particular, the π-junction behavior, generally present for strong interactions, can be completely suppressed.
机译:我们计算通过单分子结的临界约瑟夫森电流。作为具有双稳态构象自由度的分子的模型,我们研究了一个相互作用的单能级量子点,该量子点耦合到一个两级系统并弱连接到两个超导电极。我们对临界电流进行了最低次摄动计算,并表明由于两级系统,它可以发生显着变化。特别地,通常对于强相互作用存在的π结行为可以被完全抑制。

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