| Issue |
Europhys. Lett.
Volume 47, Number 2, July II 1999
|
|
|---|---|---|
| Page(s) | 227 - 232 | |
| Section | Condensed matter: electronic structure, electrical, magnetic and optical properties | |
| DOI | https://doi.org/10.1209/epl/i1999-00376-7 | |
| 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
Received:
29
March
1999
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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