The effective spin hamiltonian and phase separation instability of the almost half-filled hubbard model and the narrow-band s-ƒ model

M. I. Auslender, M. I. Katsnelson

Research output: Contribution to journalArticlepeer-review

14 Scopus citations

Abstract

The effective spin Hamiltonian is constructed in the framework of the almost half-filled Hubbard model on the Cayley tree by means of functional integral technique with the use of static approximation. The system in the ground state appears to be consisting of the ferromagnetic metallic domains and the antiferromagnetic insulating one sprovided that the concentration of excess electrons (or holes) does not exceed some critical value. The connection between the Hubbard model and the s-f{hook} model is stated.

Original languageEnglish
Pages (from-to)387-389
Number of pages3
JournalSolid State Communications
Volume44
Issue number3
DOIs
StatePublished - 1 Jan 1982
Externally publishedYes

ASJC Scopus subject areas

  • Chemistry (all)
  • Condensed Matter Physics
  • Materials Chemistry

Fingerprint

Dive into the research topics of 'The effective spin hamiltonian and phase separation instability of the almost half-filled hubbard model and the narrow-band s-ƒ model'. Together they form a unique fingerprint.

Cite this