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Density-functional description of superconducting and magnetic proximity effects across a tunneling barrier

By Jorge Quintanilla, Klaus Capelle and Luiz N. Oliveira

Abstract

A density-functional formalism for superconductivity and magnetism is presented. The resulting relations unify previously derived Kohn-Sham equations for superconductors and for noncollinear magnetism. The formalism, which discriminates Cooper-pair singlets from triplets, is applied to two quantum liquids coupled by tunneling through a barrier. An exact expression is derived, relating the eigenstates and eigenvalues of the Kohn-Sham equations, unperturbed by tunneling, on one side of the barrier to the proximity-induced ordering potential on the other

Topics: QC
Publisher: American Physical Society
Year: 2008
OAI identifier: oai:kar.kent.ac.uk:26086

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