Density-functional description of superconducting and magnetic proximity effects across a tunneling barrier
arXiv:0804.0562 · doi:10.1103/PhysRevB.78.205426
Abstract
A density-functional formalism for superconductivity {\em and} magnetism is presented. The resulting relations unify previously derived Kohn-Sham equations for superconductors and for non-collinear 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.
Phys. Rev. B, accepted (2008)
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