Density-functional description of superconducting and magnetic proximity effects across a tunneling barrier
Jorge Quintanilla, Klaus Capelle, Luiz N. Oliveira
DOI 10.1103/PhysRevB.78.205426 · Physical Review B
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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.
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