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Negative nonlocal and local voltages (resistances) in a quasi-one-dimensional superconducting aluminum structure
Physica C: Superconductivity and its Applications ( IF 1.3 ) Pub Date : 2020-12-31 , DOI: 10.1016/j.physc.2020.1353811
V.I. Kuznetsov , O.V. Trofimov

To study a nonlocal electron transport in an aluminum superconducting quasi-one-dimensional structure, we measured negative nonlocal (local) direct current voltages in the structure in a magnetic field near the critical temperature. The structure is a normal-superconducting at Tcn<T<Tcw (Tcn and Tcw are the critical temperatures for narrow and wide wires, respectively, making up this structure). Negative voltage arises due to a quasiparticle current flowing through the N-S interface. We plotted the experimental and theoretical temperature and magnetic-field dependences of current, resistance and voltage corresponding to the peak of negative voltage, taking into account either equilibrium or nonequilibrium superconducting fluctuations.



中文翻译:

准一维超导铝结构中的非局部和局部负电压(电阻)

为了研究铝超导准一维结构中的非局部电子传输,我们在临界温度附近的磁场中测量了该结构中的负非局部(局部)直流电压。该结构是常态超导ŤCñ<Ť<ŤCwŤCñŤCw分别是构成此结构的窄导线和宽导线的临界温度。由于准粒子电流流经NS界面而产生负电压。考虑到平衡或非平衡超导波动,我们绘制了实验和理论上温度,磁场对电流,电阻和电压的依赖性,这些电流,电阻和电压与负电压的峰值相对应。

更新日期:2021-01-28
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