Two-band model with an occupation-influenced hopping rate: Kondo enhancement and superconductivity

Research output: Contribution to journalArticle

15 Citations (Scopus)

Abstract

A two-band hopping model is treated where one narrow band lies near the Fermi energy. As the size of an atomic orbit depends on the occupations of the atomic levels, an occupation-influenced hopping rate with a form factor is introduced. Correlations of a new type involving orbital and spin degrees of freedom build up. The possible phase transitions are studied by logarithmic approximation in one dimension. For particular range of the position of the Fermi energy, attractive interaction and supeconductivity are generated as a consequence of the form factor.

Original languageEnglish
Pages (from-to)4682-4685
Number of pages4
JournalPhysical Review B
Volume39
Issue number7
DOIs
Publication statusPublished - 1989

Fingerprint

Superconductivity
Fermi level
occupation
form factors
superconductivity
augmentation
narrowband
Orbits
degrees of freedom
Phase transitions
orbits
orbitals
energy
approximation
interactions

ASJC Scopus subject areas

  • Condensed Matter Physics

Cite this

Two-band model with an occupation-influenced hopping rate : Kondo enhancement and superconductivity. / Zawadowski, A.

In: Physical Review B, Vol. 39, No. 7, 1989, p. 4682-4685.

Research output: Contribution to journalArticle

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