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

Jorge Quintanilla, Klaus Capelle, and Luiz N. Oliveira
Phys. Rev. B 78, 205426 – Published 20 November 2008

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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  • Received 27 April 2008

DOI:https://doi.org/10.1103/PhysRevB.78.205426

©2008 American Physical Society

Authors & Affiliations

Jorge Quintanilla1, Klaus Capelle2, and Luiz N. Oliveira2

  • 1ISIS Facility, STFC Rutherford Appleton Laboratory, Harwell Science and Innovation Centre, Didcot OX11 0QX, United Kingdom
  • 2Departamento de Física e Informática, Instituto de Física de São Carlos, Universidade de São Paulo, Caixa Postal 369, 13560-970 São Carlos, São Paulo, Brazil

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Issue

Vol. 78, Iss. 20 — 15 November 2008

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