ZERO-TEMPERATURE PHASE-DIAGRAM OF THE ONE-DIMENSIONAL T-J MODEL

Citation
Cs. Hellberg et Ej. Mele, ZERO-TEMPERATURE PHASE-DIAGRAM OF THE ONE-DIMENSIONAL T-J MODEL, Physica. B, Condensed matter, 199, 1994, pp. 322-324
Citations number
13
Categorie Soggetti
Physics, Condensed Matter
ISSN journal
09214526
Volume
199
Year of publication
1994
Pages
322 - 324
Database
ISI
SICI code
0921-4526(1994)199:<322:ZPOTOT>2.0.ZU;2-F
Abstract
We study the t-J model in one dimension by combining a variational app roach and an exact ground-state projection method. We find that the mo del exhibits Luttinger-liquid behavior for most of the phase diagram b efore the critical J/t for phase separation. However, at small densiti es and high interaction strengths, a new Luther-Emery-liquid phase wit h a gap to spin excitations and enhanced superconducting correlations is found.