Dynamics of the pairing interaction in the hubbard and t-J models of high-temperature superconductors

The question of whether one should speak of a "pairing glue" in the Hubbard and t-J models is basically a question about the dynamics of the pairing interaction. If the dynamics of the pairing interaction arises from virtual states, whose energies correspond to the Mott gap, and give rise...

Full description

Saved in:
Bibliographic Details
Published in:Physical review letters 2008-06, Vol.100 (23), p.237001-237001, Article 237001
Main Authors: Maier, T A, Poilblanc, D, Scalapino, D J
Format: Article
Language:English
Subjects:
Condensed Matter
Physics
Strongly Correlated Electrons
Citations: Items that this one cites
Items that cite this one
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:The question of whether one should speak of a "pairing glue" in the Hubbard and t-J models is basically a question about the dynamics of the pairing interaction. If the dynamics of the pairing interaction arises from virtual states, whose energies correspond to the Mott gap, and give rise to the exchange coupling J, the interaction is instantaneous on the relative time scales of interest. In this case, while one might speak of an "instantaneous glue," this interaction differs from the traditional picture of a retarded pairing interaction. However, as we will show, the dominant contribution to the pairing interaction for both of these models arises from energies reflecting the spectrum seen in the dynamic spin susceptibility. In this case, the basic interaction is retarded, and one speaks of a spin-fluctuation glue which mediates the d-wave pairing.
ISSN:0031-9007
1079-7114
DOI:10.1103/PhysRevLett.100.237001