Superconducting size effect in thin films under electric field: Mean-field self-consistent model
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
Published inPhysical Review B
© 2019 American Physical Society
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.
PublisherAmerican Physical Society
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Related funder(s)European Commission
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Additional information about fundingF.G. and P.V. acknowledge the MIURFIRB2013-Project Coca (Grant No. RBFR1379UX) and the European Research Council under the European Union's Seventh Framework Programme (FP7/2007-2013)/ERC Grant Agreement No. 615187-COMANCHE and the Horizon research and innovation program under Grant Agreement No. 800923 (SUPERTED) for partial financial support. F.G. acknowledges the innovation program under Grant No. 777222 ATTRACT (Project T-CONVERSE) and the Tuscany Region under the FARFAS 2014 project SCIADRO. A.B. acknowledges the CNR-CONICET cooperation program “Energy conversion in quantum nanoscale hybrid devices,” the SNS-WIS joint laboratory QUANTRA, funded by the Italian Ministry of Foreign Affairs and International Cooperation and the Royal Society through the international exchanges between the United Kingdom and Italy (Grants No. IES R3 170054 and No. IEC R2 192166). ...
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