Calculations of the effects of point defects on hubbard models of high temperature superconductivity

J. W. Halley, S. Davis, P. Samsel, Robert Joynt

Research output: Contribution to journalArticlepeer-review

2 Scopus citations

Abstract

We describe studies of the effects of defects on Hubbard models of high T c superconductors. We first present numerical mean field calculations on the t-J model in which disorder due to point defects in treated explicitly. Secondly, we describe variational Monte Carlo calculations at zero temperature in which the full effects of the Gutzwiller projection are included in a calculation of the variational BCS ground state including randomly distributed point defects. Finally we discuss possible microscopic mechanisms by which point defects could enhance pairing in the BCS state.

Original languageEnglish (US)
Pages (from-to)1069-1074
Number of pages6
JournalBulletin of Materials Science
Volume14
Issue number4
DOIs
StatePublished - Aug 1991

Keywords

  • Hubbard models
  • Point defects
  • oxides

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