Non-Linear Effects During Vortex Motion in Superconducting Films of Nd 1.85 Ce 0.15 CuO x
- 20 June 1995
- journal article
- Published by IOP Publishing in Europhysics Letters
- Vol. 30 (9) , 549-554
- https://doi.org/10.1209/0295-5075/30/9/008
Abstract
As predicted by Larkin and Ovchinnikov, in the low-temperature limit the flux-flow resistance of a type-II superconductor displays a logarithmic singularity at an electric current I* which originates from the contraction of the vortex core first discussed by Kramer and Pesch and which is related to the critical pair-breaking current and the inelastic quasi-particle scattering rate τin-1. We report the first observation of this effect, performing our experiments with epitaxial c-axis-oriented films of Nd1.85Ce0.15CuOx. Near 1.6 K for the inelastic-scattering rate we obtained a value as low as τin-1 = 1.7 109 s-1.Keywords
This publication has 15 references indexed in Scilit:
- Fabrication and electrical transport properties of epitaxial Nd1.85Ce0.15CuO4−y filmsPhysica C: Superconductivity and its Applications, 1995
- Electronic Instability at High Flux-Flow Velocities in High-Superconducting FilmsPhysical Review Letters, 1994
- Vortex viscosity in at low temperaturesPhysical Review B, 1994
- Microwave surface impedance at 10 GHz and quasiparticle scattering in YBa2Cu3O7 filmsApplied Physics Letters, 1993
- Microwave determination of the quasiparticle scattering time inPhysical Review B, 1993
- Temperature Dependence of Penetration Depth and Surface Resistance ofPhysical Review Letters, 1993
- Self-consistent electronic structure of a vortex line in a type-II superconductorPhysical Review B, 1991
- Nonlinearity in the flux-flow behavior of thin-film superconductorsJournal of Low Temperature Physics, 1985
- Flux flow in nearly pure low-κsuperconductorsPhysical Review B, 1975
- Core structure and low-energy spectrum of isolated vortex lines in clean superconductors atT ≪T cThe European Physical Journal A, 1974