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

K. Kobayashi; R. Sato; H. Yokoyama

doi:10.1016/j.phpro.2016.04.004

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

K. Kobayashi, R. Sato, H. Yokoyama

SCI - Physics

Research output: Contribution to journal › Conference article › peer-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 language	English
Pages (from-to)	1-4
Number of pages	4
Journal	Physics Procedia
Volume	81
DOIs	https://doi.org/10.1016/j.phpro.2016.04.004
Publication status	Published - 2016
Event	28th International Symposium on Superconductivity, ISS 2015 - Tokyo, Japan Duration: 2015 Nov 16 → 2015 Nov 18

Keywords

Superconductivity
antiferromagnetism
cuprate
t-J model
variational Monte Carlo method

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10.1016/j.phpro.2016.04.004

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title = "Band-renormalization Effect on Relationship between Superconductivity and Antiferromagnetism in t-J Model",

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.",

keywords = "Superconductivity, antiferromagnetism, cuprate, t-J model, variational Monte Carlo method",

author = "K. Kobayashi and R. Sato and H. Yokoyama",

note = "Publisher Copyright: {\textcopyright} 2016 The Authors.; 28th International Symposium on Superconductivity, ISS 2015 ; Conference date: 16-11-2015 Through 18-11-2015",

year = "2016",

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journal = "Physics Procedia",

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TY - JOUR

T1 - Band-renormalization Effect on Relationship between Superconductivity and Antiferromagnetism in t-J Model

AU - Kobayashi, K.

AU - Sato, R.

AU - Yokoyama, H.

PY - 2016

Y1 - 2016

N2 - 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.

AB - 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.

KW - Superconductivity

KW - antiferromagnetism

KW - cuprate

KW - t-J model

KW - variational Monte Carlo method

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DO - 10.1016/j.phpro.2016.04.004

M3 - Conference article

AN - SCOPUS:84994578340

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SP - 1

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JO - Physics Procedia

JF - Physics Procedia

T2 - 28th International Symposium on Superconductivity, ISS 2015

Y2 - 16 November 2015 through 18 November 2015

ER -

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

Abstract

Keywords

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