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Title: Superconductivity in the two-dimensional Hubbard model: One-particle correlation functions

Abstract

The one-particle correlation functions of a {ital d}{sub {ital x}}{sup 2}{minus}{ital y}{sup 2} superconducting state in the two-dimensional Hubbard model are investigated within the fluctuation-exchange approximation. This approximation has been previously applied to investigate properties of the Hubbard-model normal state, including incipient instabilities. Results are obtained for the wave vector and temperature dependence of the one-particle energy gap. A miximum gap ratio 2{Delta}{sub {ital k}}{sup max}({ital T}=0)/{ital k}{sub {ital B}}{ital T}{sub {ital c}} of order 10 is obtained for intermediate coupling strengths and electron densities near one per site. The potential appearance of spin excitons in two-particle response functions is discussed.

Authors:
;  [1]
  1. Department of Physics, University of Southern California, Los Angeles, California 90089 (United States)
Publication Date:
OSTI Identifier:
55090
Resource Type:
Journal Article
Journal Name:
Physical Review, B: Condensed Matter
Additional Journal Information:
Journal Volume: 51; Journal Issue: 22; Other Information: PBD: 1 Jun 1995
Country of Publication:
United States
Language:
English
Subject:
66 PHYSICS; HUBBARD MODEL; SUPERCONDUCTIVITY; CORRELATION FUNCTIONS; D WAVES; TWO-DIMENSIONAL CALCULATIONS; ENERGY GAP; TEMPERATURE DEPENDENCE; ELECTRON DENSITY; EXCITONS

Citation Formats

Pao, C, and Bickers, N E. Superconductivity in the two-dimensional Hubbard model: One-particle correlation functions. United States: N. p., 1995. Web. doi:10.1103/PhysRevB.51.16310.
Pao, C, & Bickers, N E. Superconductivity in the two-dimensional Hubbard model: One-particle correlation functions. United States. doi:10.1103/PhysRevB.51.16310.
Pao, C, and Bickers, N E. Thu . "Superconductivity in the two-dimensional Hubbard model: One-particle correlation functions". United States. doi:10.1103/PhysRevB.51.16310.
@article{osti_55090,
title = {Superconductivity in the two-dimensional Hubbard model: One-particle correlation functions},
author = {Pao, C and Bickers, N E},
abstractNote = {The one-particle correlation functions of a {ital d}{sub {ital x}}{sup 2}{minus}{ital y}{sup 2} superconducting state in the two-dimensional Hubbard model are investigated within the fluctuation-exchange approximation. This approximation has been previously applied to investigate properties of the Hubbard-model normal state, including incipient instabilities. Results are obtained for the wave vector and temperature dependence of the one-particle energy gap. A miximum gap ratio 2{Delta}{sub {ital k}}{sup max}({ital T}=0)/{ital k}{sub {ital B}}{ital T}{sub {ital c}} of order 10 is obtained for intermediate coupling strengths and electron densities near one per site. The potential appearance of spin excitons in two-particle response functions is discussed.},
doi = {10.1103/PhysRevB.51.16310},
journal = {Physical Review, B: Condensed Matter},
number = 22,
volume = 51,
place = {United States},
year = {1995},
month = {6}
}