Superconductivity in the twodimensional Hubbard model: Oneparticle correlation functions
Abstract
The oneparticle correlation functions of a {ital d}{sub {ital x}}{sup 2}{minus}{ital y}{sup 2} superconducting state in the twodimensional Hubbard model are investigated within the fluctuationexchange approximation. This approximation has been previously applied to investigate properties of the Hubbardmodel normal state, including incipient instabilities. Results are obtained for the wave vector and temperature dependence of the oneparticle 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 twoparticle response functions is discussed.
 Authors:

 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; TWODIMENSIONAL CALCULATIONS; ENERGY GAP; TEMPERATURE DEPENDENCE; ELECTRON DENSITY; EXCITONS
Citation Formats
Pao, C, and Bickers, N E. Superconductivity in the twodimensional Hubbard model: Oneparticle correlation functions. United States: N. p., 1995.
Web. doi:10.1103/PhysRevB.51.16310.
Pao, C, & Bickers, N E. Superconductivity in the twodimensional Hubbard model: Oneparticle correlation functions. United States. doi:10.1103/PhysRevB.51.16310.
Pao, C, and Bickers, N E. Thu .
"Superconductivity in the twodimensional Hubbard model: Oneparticle correlation functions". United States. doi:10.1103/PhysRevB.51.16310.
@article{osti_55090,
title = {Superconductivity in the twodimensional Hubbard model: Oneparticle correlation functions},
author = {Pao, C and Bickers, N E},
abstractNote = {The oneparticle correlation functions of a {ital d}{sub {ital x}}{sup 2}{minus}{ital y}{sup 2} superconducting state in the twodimensional Hubbard model are investigated within the fluctuationexchange approximation. This approximation has been previously applied to investigate properties of the Hubbardmodel normal state, including incipient instabilities. Results are obtained for the wave vector and temperature dependence of the oneparticle 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 twoparticle 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}
}