First-principles approach to thin superconducting slabs and heterostructures

Article

关键词: ELECTRON-PHONON INTERACTIONS;    2-DIMENSIONAL LIMIT;    TRANSITION-METALS;    FILMS;    RESONANCES;   

DOI  :  10.1103/PhysRevB.94.140502

来源: SCIE

【 摘 要 】

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.

【 授权许可】

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