Spin-gap phase in the extended t-J chain

Details Spin-gap phase in the extended t-J chain Spin-gap phase in the extended t-J chain

2002-12-10

arxiv.org/abs/cond-mat/0212207v3

Eur. Phys. J. B37, 7 (2004)

Physics

Condensed Matter

Strongly Correlated Electrons

8 pages, 2 figures

Scientific paper

We study the one-dimensional deformed $t-t^{\prime}-J$ model in terms of the continuum field theories. We found that at low doping concentration and far away from the phase separation regime, there are two phases: the Luttinger liquid and the Luther-Emery liquid, depending on t'/t<(t'/t)_c or t'/t>(t'/t)_c, where (t'/t)_c>0. Moreover, the singlet superconducting correlations are dominant in the Luther-Emery liquid.

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