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 ?/? close to subband edges as a function of the Fermi energy ? and follows 3D scaling (?/?)2 away from them. We discuss nonlinearities beyond the gate effect and contrast results with recent experiments on gating effects on Josephson junctions.
Superconducting size effect in thin films under electric field: Mean-field self-consistent model
Virtanen P;Braggio A;Giazotto F
2019
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 ?/? close to subband edges as a function of the Fermi energy ? and follows 3D scaling (?/?)2 away from them. We discuss nonlinearities beyond the gate effect and contrast results with recent experiments on gating effects on Josephson junctions.File in questo prodotto:
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