A1 Journal article (refereed)
Field dependence of the vortex-core size in dirty two-band superconductors (2019)

Vargunin, A., & Silaev, M. (2019). Field dependence of the vortex-core size in dirty two-band superconductors. Physical Review B, 100(1), Article 014516. https://doi.org/10.1103/PhysRevB.100.014516

JYU authors or editors

Publication details

All authors or editors: Vargunin, Artjom; Silaev, Mikhail

Journal or series: Physical Review B

ISSN: 2469-9950

eISSN: 2469-9969

Publication year: 2019

Volume: 100

Issue number: 1

Article number: 014516

Publisher: American Physical Society

Publication country: United States

Publication language: English

DOI: https://doi.org/10.1103/PhysRevB.100.014516

Publication open access: Not open

Publication channel open access: 

Publication is parallel published (JYX): https://jyx.jyu.fi/handle/123456789/65190

Web address of parallel published publication (pre-print): https://arxiv.org/abs/1903.12406

Abstract

We study the structure of Abrikosov vortices in two-band superconductors for different external magnetic fields and different parameters of the bands, including the interband scattering rate. The vortex-core size determined by the coherence lengths is found to have qualitatively different behavior from that determined by the quasiparticle density of states spatial variation. These different vortex-core length scales coincide near the upper critical field, while the discrepancy between them becomes quite significant at lower fields. Within the diffusive approximation we demonstrate several generic regimes in the field dependence of the vortex-core sizes determined by the disparity of diffusion constants in the two bands, interband pairing, and interband scattering rate.

Keywords: superconductors; superconductivity

Free keywords: coherence length; multiband superconductivity; vortices in superconductors; disordered systems

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Related projects

Ministry reporting: Yes

Reporting Year: 2019

JUFO rating: 2