Effects of Weak Intersite Repulsion and Negative Diagonal Transfer on Superconductivity and Antiferromagnetism in Hubbard Model

Kenji Kobayashi, Hisatoshi Yokoyama

Research output: Contribution to journalConference article

5 Citations (Scopus)

Abstract

Withcuprate superconductors in mind, we study the effects of intersite repulsion V and diagonal transfer on antiferromagnetism (AF) and superconductivity (SC) inthe Hubbard model on a squarelattice, using a variational Monte Carlo method. In the trial wave function, essential factors for Mott physics and band renormalization are included. It is foundthat the effect of small V generally suppresses SC, but makesthe range of doping rate unstable toward phase separation narrower.The effect of also extends thearea stable against charge inhomogeneity, and, in particular,removesthe area of a coexistent state of SC and AF.

Original languageEnglish
Pages (from-to)9-12
Number of pages4
JournalPhysics Procedia
Volume65
DOIs
Publication statusPublished - 2015 Jan 1
Event27th International Symposium on Superconductivity, ISS 2014 - Tokyo, Japan
Duration: 2014 Nov 252014 Nov 27

Keywords

  • Hubbard model
  • Mott physics
  • cuprate
  • repulsive intersite interaction
  • variational Monte Carlo method

ASJC Scopus subject areas

  • Physics and Astronomy(all)

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