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Periodicity of superconducting shape resonances in thin films

Contributors

Valentinis, Davide Filippo; Berthod, Christophe

Published in

Physical Review. B, Condensed Matter, vol. 102, no. 054518

Publication date

2020

Abstract

The pairing temperature of superconducting thin films is expected to display, within the Bardeen–Cooper–Schrieffer theory, oscillations as a function of the film thickness. We show that the pattern of these oscillations switches between two different periodicities at a density-dependent value of the superconducting coupling. The transition is most abrupt in the antiadiabatic regime, where the Fermi energy is less than the Debye energy. To support our numerical data, we provide analytical expressions for the chemical potential and the pairing temperature as a function of thickness, which only differ from the exact solution at weak coupling by exponentially small corrections.

UNIGE affiliation entities

UNIGE research groups

Citation (ISO format)

VALENTINIS, Davide Filippo, BERTHOD, Christophe. Periodicity of superconducting shape resonances in thin films. In: Physical Review. B, Condensed Matter, 2020, vol. 102, n° 054518. doi: 10.1103/PhysRevB.102.054518

Main files (1)

Article (Published version)

Identifiers

Datasets

Journal ISSN

1098-0121
328views
483downloads

Technical informations

Creation

04/01/2021 15:00:00

First validation

04/01/2021 15:00:00

Update

15/03/2023 23:49:50

Status update

15/03/2023 23:49:49

Last indexation

31/10/2024 20:58:54
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