Close relation between antinodal Fermi-surface effect and superconductivity in cuprates

Hisatoshi Yokoyama, Masao Ogata, Kenji Kobayashi

Research output: Contribution to journalArticle

1 Citation (Scopus)

Abstract

A strongly correlated Hubbard (t-t-U) model is studied using a variational Monte Carlo method. The magnitude of momentum distribution function n(k) varies slightly near the nodal quasi-Fermi surface [∼(π/2,π/2)], but varies outstandingly in an antinodal part [near (π,0)], as the value of t′/t varies, which is sensitive to the strength of superconductivity. Furthermore, the behavior of the slope of n(k) around (π,0) coincides well with that of the d-wave superconducting correlation function. It follows the electrons near the antinode play a leading role to control the strength of superconductivity.

Original languageEnglish
JournalPhysica C: Superconductivity and its applications
Volume470
Issue numberSUPPL.1
DOIs
Publication statusPublished - 2010 Dec 1

Keywords

  • Antinode
  • Cuprate
  • Fermi surface
  • Superconductivity
  • Twogap
  • Van Hove singularity

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics
  • Energy Engineering and Power Technology
  • Electrical and Electronic Engineering

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