MAGNETIC PHASE-DIAGRAM AND TRANSPORT-PROPERTIES OF THE T-J MODEL - A SPIN-ROTATION INVARIANT SLAVE-BOSON APPROACH

Citation
M. Deeg et al., MAGNETIC PHASE-DIAGRAM AND TRANSPORT-PROPERTIES OF THE T-J MODEL - A SPIN-ROTATION INVARIANT SLAVE-BOSON APPROACH, Europhysics letters, 26(2), 1994, pp. 109-115
Citations number
21
Categorie Soggetti
Physics
Journal title
ISSN journal
02955075
Volume
26
Issue
2
Year of publication
1994
Pages
109 - 115
Database
ISI
SICI code
0295-5075(1994)26:2<109:MPATOT>2.0.ZU;2-N
Abstract
On the basis of a spin-rotation-invariant formulation of the Kotliar-R uckenstein slave-boson representation the t-J model is studied on a sq uare lattice. The ground-state phase diagram is derived numerically, b y taking into account also incommensurate magnetic structures. The dom ain of phase separation is determined. The correlation-induced band re normalization is in excellent agreement with Lanczos results. We calcu lated the doping dependence of Hall resistivity and thermopower using the relaxation time approximation, the results being in accord with ex periments on La2-deltaSrdeltaCuO4.