Band-renormalization Effect on Relationship between Superconductivity and Antiferromagnetism in t-J Model

K. Kobayashi, R. Sato, H. Yokoyama

Research output: Contribution to journalConference articlepeer-review

2 Citations (Scopus)

Abstract

Having cuprate superconductors in mind, we study a band-renormalization effect on a coexisting state of antiferromagnetism (AF) and superconductivity (SC) in a t-J model on a square lattice with a diagonal transfer t′ and three-site hopping terms, using a variational Monte Carlo method. It is found that this t-J model with t′/t = -0.3 exhibits coexistence of AF and SC orders in lightly doped regime and robust SC for a wide range of doping rate δ. This result contrasts with the previous results of a large-U/t Hubbard model, in which the two orders are mutually exclusive and a coexisting state does not appear; the SC state appears only in heavily doped regime (δl∼ 0.2), after the pure AF state vanishes at δ ∼ 0.2.

Original languageEnglish
Pages (from-to)1-4
Number of pages4
JournalPhysics Procedia
Volume81
DOIs
Publication statusPublished - 2016 Jan 1
Event28th International Symposium on Superconductivity, ISS 2015 - Tokyo, Japan
Duration: 2015 Nov 162015 Nov 18

Keywords

  • Superconductivity
  • antiferromagnetism
  • cuprate
  • t-J model
  • variational Monte Carlo method

ASJC Scopus subject areas

  • Physics and Astronomy(all)

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