Anderson model in a superconductor: Φ-derivable theory

Ari T. Alastalo, Robert J. Joynt, Martti M. Salomaa

Research output: Contribution to journalOther journal contributionScientific

4 Citations (Scopus)


We introduce a new φ-derivable approach for the Anderson impurity model in a BCS superconductor. The regime of validity of this conserving theory extends well beyond that of the Hartree - Fock approximation. This is the first generalization of the U-perturbation theory to encompass a superconductor.
Original languageEnglish
Pages (from-to)L63-L68
JournalJournal of Physics: Condensed Matter
Issue number3
Publication statusPublished - 1998
MoE publication typeB1 Article in a scientific magazine


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