Volume 47, Number 2, July II 1999
|Page(s)||227 - 232|
|Section||Condensed matter: electronic structure, electrical, magnetic and optical properties|
|Published online||01 September 2002|
A self-consistent analytic treatment of two holes in the t-J model
Max-Planck-Institut für Festkörperforschung Heisenbergstraße 1, 70569 Stuttgart, Germany
Accepted: 19 May 1999
The behavior of two holes in the t-J model is analyzed on the infinite square lattice by an extension of the self-consistent Born approximation, which has proved to be very accurate in the single-hole problem. The main ingredient of our theory is the exact form of the eigenstates. Our results agree well with those of previous numerical studies of the problem. The d-wave bound state is found to have the lowest energy with a critical value , and there is no indication for a crossover between the d-wave and the p-wave bound states.
PACS: 71.27.+a – Strongly correlated electron systems; heavy fermions / 74.72.-h – High-Tc compounds / 75.10.Jm – Quantized spin models
© EDP Sciences, 1999
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