Negative magnetoresistance of ultra-narrow superconducting nanowires in the resistive state
| dc.creator | Arutyunov, K. Yu. | |
| dc.date | 2007-08-20 | |
| dc.date | 2007-08-22 | |
| dc.date.accessioned | 2026-07-07T13:00:27Z | |
| dc.date.available | 2026-07-07T13:00:27Z | |
| dc.description | We present a phenomenological model qualitatively explaining negative magnetoresistance in quasi-one-dimensional superconducting channels in the resistive state. The model is based on the assumption that fluctuations of the order parameter (phase slips) are responsible for the finite effective resistance of a narrow superconducting wire sufficiently close to the critical temperature. Each fluctuation is accompanied by an instant formation of a quasi-normal region of the order of the non-equilibrium quasiparticle relaxation length 'pinned' to the core of the phase slip. The effective time-averaged voltage measured in experiment is a sum of two terms. First one is the conventional contribution linked to the rate of the fluctuations via the Josephson relation. Second term is the Ohmic contribution of this quasi-normal region. Depending on material properties of the wire, there might be a range of magnetic fields where the first term is not much affected, while the second term is effectively suppressed contributing to the experimentally observed negative magnetoresistance. | |
| dc.description | 10 pages including 2 figures | |
| dc.identifier | https://arxiv.org/abs/0708.2602 | |
| dc.identifier | http://arxiv.org/abs/0708.2602 | |
| dc.identifier | Physica C 468 (2008) 272--275 | |
| dc.identifier | doi:10.1016/j.physc.2007.08.027 | |
| dc.identifier.uri | http://salesiana.dossiersoluciones.com/handle/123456789/225846 | |
| dc.subject | Superconductivity | |
| dc.title | Negative magnetoresistance of ultra-narrow superconducting nanowires in the resistive state | |
| dc.type | text |