Multiple scattering theory for superconducting heterostructures

Gábor Csire, B. Újfalussy, J. Cserti, Balázs Gyorffy

Research output: Article

9 Citations (Scopus)

Abstract

We generalize the screened Korringa-Kohn-Rostoker method for solving the corresponding Kohn-Sham-Bogoliubov-de Gennes equations for surfaces and interfaces. As an application of the theory, we study the quasiparticle spectrum of Au overlayers on a Nb(100) host. We find that within the superconducting gap region, the quasiparticle spectrum consists of Andreev bound states with a dispersion which is closely connected to the underlying electronic structure of the overlayer. We also find that the spectrum has a strongly k-dependent induced gap. The properties of the gap are discussed in relation to the thickness of the overlayer, and it is shown that certain states do not participate in the Andreev scattering process.

Original languageEnglish
Article number165142
JournalPhysical Review B - Condensed Matter and Materials Physics
Volume91
Issue number16
DOIs
Publication statusPublished - ápr. 30 2015

Fingerprint

Multiple scattering
Electronic structure
Heterojunctions
Scattering
scattering
electronic structure

ASJC Scopus subject areas

  • Condensed Matter Physics
  • Electronic, Optical and Magnetic Materials

Cite this

Multiple scattering theory for superconducting heterostructures. / Csire, Gábor; Újfalussy, B.; Cserti, J.; Gyorffy, Balázs.

In: Physical Review B - Condensed Matter and Materials Physics, Vol. 91, No. 16, 165142, 30.04.2015.

Research output: Article

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