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Title: Pair-fluctuation-induced pseudogap in the normal phase of the two-dimensional attractive Hubbard model at weak coupling

Abstract

One-particle spectral properties in the normal phase of the two-dimensional attractive Hubbard model are investigated in the weak-coupling regime using the non-self-consistent T-matrix approximation. The corresponding equations are evaluated numerically directly on the real-frequency axis. For temperatures sufficiently close to the superconducting transition temperature, a pseudogap in the one-particle spectral function is observed, which can be assigned to the increasing importance of pair fluctuations.

Authors:
;
Publication Date:
Sponsoring Org.:
(US)
OSTI Identifier:
40203505
Resource Type:
Journal Article
Journal Name:
Physical Review B
Additional Journal Information:
Journal Volume: 63; Journal Issue: 22; Other Information: DOI: 10.1103/PhysRevB.63.224509; Othernumber: PRBMDO000063000022224509000001; 049122PRB; PBD: 1 Jun 2001; Journal ID: ISSN 0163-1829
Publisher:
The American Physical Society
Country of Publication:
United States
Language:
English
Subject:
71 CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS; FLUCTUATIONS; HUBBARD MODEL; S MATRIX; SPECTRAL FUNCTIONS; TRANSITION TEMPERATURE

Citation Formats

Rohe, Daniel, and Metzner, Walter. Pair-fluctuation-induced pseudogap in the normal phase of the two-dimensional attractive Hubbard model at weak coupling. United States: N. p., 2001. Web. doi:10.1103/PhysRevB.63.224509.
Rohe, Daniel, & Metzner, Walter. Pair-fluctuation-induced pseudogap in the normal phase of the two-dimensional attractive Hubbard model at weak coupling. United States. doi:10.1103/PhysRevB.63.224509.
Rohe, Daniel, and Metzner, Walter. Fri . "Pair-fluctuation-induced pseudogap in the normal phase of the two-dimensional attractive Hubbard model at weak coupling". United States. doi:10.1103/PhysRevB.63.224509.
@article{osti_40203505,
title = {Pair-fluctuation-induced pseudogap in the normal phase of the two-dimensional attractive Hubbard model at weak coupling},
author = {Rohe, Daniel and Metzner, Walter},
abstractNote = {One-particle spectral properties in the normal phase of the two-dimensional attractive Hubbard model are investigated in the weak-coupling regime using the non-self-consistent T-matrix approximation. The corresponding equations are evaluated numerically directly on the real-frequency axis. For temperatures sufficiently close to the superconducting transition temperature, a pseudogap in the one-particle spectral function is observed, which can be assigned to the increasing importance of pair fluctuations.},
doi = {10.1103/PhysRevB.63.224509},
journal = {Physical Review B},
issn = {0163-1829},
number = 22,
volume = 63,
place = {United States},
year = {2001},
month = {6}
}