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Zero-temperature phase diagram of the one-dimensional t−J model

✍ Scribed by C.Stephen Hellberg; E.J. Mele

Publisher: Elsevier Science
Year: 1994
Tongue: English
Weight: 193 KB
Volume: 199-200
Category: Article
ISSN: 0921-4526
DOI: 10.1016/0921-4526(94)91823-6

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✦ Synopsis

We study the t-J model in one dimension by combining a variational approach and an exact ground-state projection method. We find that the model exhibits Luttinger-liquid behavior for most of the phase diagram before the critical J/t for phase separation. However, at small densities and high interaction strengths, a new Luther-Emery-liquid phase with a gap to spin excitations and enhanced superconducting correlations is found.

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