First-principles approach to thin superconducting slabs and heterostructures

Gábor Csire*, Stephan Schönecker, Balázs Újfalussy

*Corresponding author for this work

Research output: Contribution to journalArticle (Academic Journal)peer-review

3 Citations (Scopus)
228 Downloads (Pure)

Abstract

We present a fully first-principles method for superconducting thin films. The layer dependent phonon spectrum is calculated to determine the layer dependence of the electron-phonon coupling for such systems, which is coupled to the Kohn-Sham-Bogoliubov-de Gennes equations, and it is solved in a parameter-free way. The theory is then applied to different surface facets of niobium slabs and to niobium-gold heterostructures. We investigate the dependence of the transition temperature on the thickness of the slabs and the inverse proximity effect observed in thin superconducting heterostructures.

Original languageEnglish
Article number140502
Number of pages5
JournalPhysical Review B
Volume94
Issue number14
DOIs
Publication statusPublished - 10 Oct 2016

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