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

Kenji Kobayashi; Hisatoshi Yokoyama

doi:10.1016/j.phpro.2015.05.095

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

Kenji Kobayashi, Hisatoshi Yokoyama

SCI - Physics

Chiba Institute of Technology

Research output: Contribution to journal › Conference article › peer-review

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 language	English
Pages (from-to)	9-12
Number of pages	4
Journal	Physics Procedia
Volume	65
DOIs	https://doi.org/10.1016/j.phpro.2015.05.095
Publication status	Published - 2015
Event	27th International Symposium on Superconductivity, ISS 2014 - Tokyo, Japan Duration: 2014 Nov 25 → 2014 Nov 27

Keywords

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

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10.1016/j.phpro.2015.05.095

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title = "Effects of Weak Intersite Repulsion and Negative Diagonal Transfer on Superconductivity and Antiferromagnetism in Hubbard Model",

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.",

keywords = "Hubbard model, Mott physics, cuprate, repulsive intersite interaction, variational Monte Carlo method",

author = "Kenji Kobayashi and Hisatoshi Yokoyama",

note = "Publisher Copyright: {\textcopyright} 2015 The Authors.; 27th International Symposium on Superconductivity, ISS 2014 ; Conference date: 25-11-2014 Through 27-11-2014",

year = "2015",

doi = "10.1016/j.phpro.2015.05.095",

language = "English",

volume = "65",

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TY - JOUR

T1 - Effects of Weak Intersite Repulsion and Negative Diagonal Transfer on Superconductivity and Antiferromagnetism in Hubbard Model

AU - Kobayashi, Kenji

AU - Yokoyama, Hisatoshi

PY - 2015

Y1 - 2015

N2 - 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.

AB - 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.

KW - Hubbard model

KW - Mott physics

KW - cuprate

KW - repulsive intersite interaction

KW - variational Monte Carlo method

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U2 - 10.1016/j.phpro.2015.05.095

DO - 10.1016/j.phpro.2015.05.095

M3 - Conference article

AN - SCOPUS:84948409706

SN - 1875-3884

VL - 65

SP - 9

EP - 12

JO - Physics Procedia

JF - Physics Procedia

T2 - 27th International Symposium on Superconductivity, ISS 2014

Y2 - 25 November 2014 through 27 November 2014

ER -

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

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Keywords

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