Large-U cluster-Hamiltonian expansion of the Hubbard model

Dimitri Antoniou, A. MacDonald

Research output: Contribution to journalArticlepeer-review

1 Scopus citations

Abstract

We discuss an expansion of the low-energy effective Hamiltonian of the large-U Hubbard model, in which higher-order terms involve lattice clusters with larger numbers of sites rather than larger powers of the hopping amplitude parameter t. Expressions for each term, valid to all orders in t, can be obtained by exactly diagonalizing the Hubbard model for small clusters. Leading terms in this expansion are derived.

Original languageEnglish (US)
Pages (from-to)6855-6858
Number of pages4
JournalPhysical Review B - Condensed Matter and Materials Physics
Volume53
Issue number11
DOIs
StatePublished - 1996
Externally publishedYes

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics

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