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

Hisatoshi Yokoyama; Masao Ogata; Kenji Kobayashi

doi:10.1016/j.physc.2009.10.029

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

Hisatoshi Yokoyama, Masao Ogata, Kenji Kobayashi

SCI - Physics

Research output: Contribution to journal › Article › peer-review

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 language	English
Pages (from-to)	S149-S150
Journal	Physica C: Superconductivity and its applications
Volume	470
Issue number	SUPPL.1
DOIs	https://doi.org/10.1016/j.physc.2009.10.029
Publication status	Published - 2010 Dec

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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title = "Close relation between antinodal Fermi-surface effect and superconductivity in cuprates",

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.",

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T1 - Close relation between antinodal Fermi-surface effect and superconductivity in cuprates

AU - Yokoyama, Hisatoshi

AU - Ogata, Masao

AU - Kobayashi, Kenji

PY - 2010/12

Y1 - 2010/12

N2 - 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.

AB - 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.

KW - Antinode

KW - Cuprate

KW - Fermi surface

KW - Superconductivity

KW - Twogap

KW - Van Hove singularity

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DO - 10.1016/j.physc.2009.10.029

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SN - 0921-4534

IS - SUPPL.1

ER -

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

Abstract

Keywords

ASJC Scopus subject areas

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