A1 Journal article (refereed)
Unusual resistive states of multiband superconductors in the effective field theory approach (2020)

Vargunin, A., Silaev, M. A., & Babaev, E. (2020). Unusual resistive states of multiband superconductors in the effective field theory approach. EPL, 130(1), Article 17001. https://doi.org/10.1209/0295-5075/130/17001

JYU authors or editors

Publication details

All authors or editors: Vargunin, A.; Silaev, M. A.; Babaev, E.

Journal or series: EPL

ISSN: 0295-5075

eISSN: 1286-4854

Publication year: 2020

Volume: 130

Issue number: 1

Article number: 17001

Publisher: EPLA; Institute of Physics Publishing Ltd.

Publication country: France

Publication language: English

DOI: https://doi.org/10.1209/0295-5075/130/17001

Publication open access: Not open

Publication channel open access:

Abstract

Starting from the microscopic approach based on multiband Keldysh-Usadel kinetic theory we derive the minimal field-theoretical model equivalent to the time-dependent Ginzburg-Landau theory. We discuss the properties of resistive states determined by the ratio of electric field relaxation length to the superconducting coherence length. In contrast to the well-studied single-band systems we find that this ratio can vary in wide limits in multiband superconductors. As a result, the properties of resistive states in multiband superconductors can be tuned by the microscopic parameters such as the ratio of diffusion coefficients and pairing constants in different bands. As an example we consider moving Abrikosov vortices in two-band superconductor and show that the flux-flow magneto-resistance can strongly deviate from the single-component Bardeen-Stephen estimation in agreement with recent experimental results.

Keywords: superconductors; superconductivity; electric fields

Contributing organizations

Related projects

Ministry reporting: Yes

Reporting Year: 2020

JUFO rating: 1