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arXiv 2103.06984cond-mat.supr-con
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一种约瑟夫森结超导二极管

A Josephson junction supercurrent diode

Christian Baumgartner, Lorenz Fuchs, Andreas Costa, Simon Reinhardt, Sergei Gronin, Geoffrey C. Gardner, Tyler Lindemann, Michael J. Manfra, Paulo E. Faria Juni… 展开作者

Christian Baumgartner, Lorenz Fuchs, Andreas Costa, Simon Reinhardt, Sergei Gronin, Geoffrey C. Gardner, Tyler Lindemann, Michael J. Manfra, Paulo E. Faria Junior, Denis Kochan, Jaroslav Fabian, Nicola Paradiso, Christoph Strunk

摘要:

当不仅电流的符号而且电流的绝对值取决于所施加电压的极性时,输运被称为非互易。它需要同时打破反演和时间反演对称性,例如,通过自旋轨道耦合和磁场的相互作用。到目前为止,对非互易性的观察总是与电阻率有关,而无耗散的非互易电路元件是难以捉摸的。在这里,我们的工程师完全超导非互易设备的基础上高度透明的约瑟夫森结上InAs量子阱制造。我们证明超导整流远低于转变温度。通过测量约瑟夫森电感,我们将超导非互易性与电流-相位关系的不对称性联系起来,并首次直接导出了超导磁手征各向异性系数。半定量模型很好地解释了我们的实验数据的主要特点。非互易约瑟夫森结有可能成为超导电路的$pn$结是传统的电子学,开辟了新的非耗散电路元件的方式。

英文摘要:

Transport is called nonreciprocal when not only the sign, but also the absolute value of the current, depends on the polarity of the applied voltage. It requires simultaneously broken inversion and time-reversal symmetries, e.g., by the interplay of spin-orbit coupling and magnetic field. So far, observation of nonreciprocity was always tied to resistivity, and dissipationless nonreciprocal circuit elements were elusive. Here, we engineer fully superconducting nonreciprocal devices based on highly-transparent Josephson junctions fabricated on InAs quantum wells. We demonstrate supercurrent rectification far below the transition temperature. By measuring Josephson inductance, we can link nonreciprocal supercurrent to the asymmetry of the current-phase relation, and directly derive the supercurrent magnetochiral anisotropy coefficient for the first time. A semi-quantitative model well explains the main features of our experimental data. Nonreciprocal Josephson junctions have the potential to become for superconducting circuits what $pn$-junctions are for traditional electronics, opening the way to novel nondissipative circuit elements.

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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