DYNAMIC SPIN SUSCEPTIBILITY IN THE T-J MODEL

Authors
DZHAKELI G PLAKIDA NM
Citation
G. Dzhakeli et Nm. Plakida, DYNAMIC SPIN SUSCEPTIBILITY IN THE T-J MODEL, Theoretical and mathematical physics, 114(3), 1998, pp. 335-344
Citations number
19
Categorie Soggetti
Physycs, Mathematical",Physics,"Physycs, Mathematical
Journal title
Theoretical and mathematical physics → ACNP
ISSN journal
00405779
Volume
114
Issue
3
Year of publication
1998
Pages
335 - 344
Database
ISI
SICI code
0040-5779(1998)114:3<335:DSSITT>2.0.ZU;2-W
Abstract
The dynamic spin susceptibility is calculated for the t-J model in the paramagnetic phase using the memory function method in terms of the H ubbard operators. A self-consistent system of equations for the memory function is obtained in the mode-coupling approximation. Both itinera nt hole excitations and localized spin fluctuations contribute to the memory function. The spin dynamics have a diffusive character in the h ydrodynamic limit; spin-wave-like excitations are regained in the high -frequency region.