Negative nonlocal and local voltages (resistances) in a quasi-one-dimensional superconducting aluminum structure
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arXiv
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| Format: | Preprint |
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2026
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| _version_ | 1866911633124622336 |
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| author | Kuznetsov, V. I. Trofimov, O. V. |
| author_facet | Kuznetsov, V. I. Trofimov, O. V. |
| contents | 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 $T_{cn}<T<T_{cw}$ ($T_{cn}$ and $T_{cw}$ 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. |
| format | Preprint |
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arxiv_https___arxiv_org_abs_2604_26814 |
| institution | arXiv |
| publishDate | 2026 |
| record_format | arxiv |
| spellingShingle | Negative nonlocal and local voltages (resistances) in a quasi-one-dimensional superconducting aluminum structure Kuznetsov, V. I. Trofimov, O. V. Superconductivity Mesoscale and Nanoscale Physics 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 $T_{cn}<T<T_{cw}$ ($T_{cn}$ and $T_{cw}$ 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. |
| title | Negative nonlocal and local voltages (resistances) in a quasi-one-dimensional superconducting aluminum structure |
| topic | Superconductivity Mesoscale and Nanoscale Physics |
| url | https://arxiv.org/abs/2604.26814 |