Phys. Rev. B 78, 205426 (2008) [10 pages]Density-functional description of superconducting and magnetic proximity effects across a tunneling barrierReceived 27 April 2008; revised 23 October 2008; published 20 November 2008 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. © 2008 The American Physical Society URL:
http://link.aps.org/doi/10.1103/PhysRevB.78.205426
DOI:
10.1103/PhysRevB.78.205426
PACS:
71.15.Mb, 74.20.Rp, 75.70.Cn, 74.78.Fk
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