A1 Journal article (refereed)
Superconducting size effect in thin films under electric field: Mean-field self-consistent model (2019)

Virtanen, P., Braggio, A., & Giazotto, F. (2019). Superconducting size effect in thin films under electric field: Mean-field self-consistent model. Physical Review B, 100(22), Article 224506. https://doi.org/10.1103/PhysRevB.100.224506

JYU authors or editors

Virtanen, Pauli

Publication details

All authors or editors: Virtanen, P.; Braggio, A.; Giazotto, F.

Journal or series: Physical Review B

ISSN: 2469-9950

eISSN: 2469-9969

Publication year: 2019

Volume: 100

Issue number: 22

Article number: 224506

Publisher: American Physical Society

Publication country: United States

Publication language: English

DOI: https://doi.org/10.1103/PhysRevB.100.224506

Publication open access: Not open

Publication channel open access:

Publication is parallel published (JYX): https://jyx.jyu.fi/handle/123456789/67950

Web address of parallel published publication (pre-print): https://arxiv.org/abs/1903.01155

Abstract

We consider the effects of an externally applied electrostatic field on superconductivity, self-consistently within a BCS mean-field model, for a clean three-dimensional (3D) metal thin film. The electrostatic change in superconducting condensation energy scales as Δ/μ close to subband edges as a function of the Fermi energy μ and follows 3D scaling (Δ/μ)2 away from them. We discuss nonlinearities beyond the gate effect and contrast results with recent experiments on gating effects on Josephson junctions.

Keywords: superconductivity; superconductors; thin films

Free keywords: superconducting phase transition; mesoscopics; thin films

Fields of science: