Spin-gap phase in the extended t — J chain

Yu-Wen Lee () and Yu-Li Lee

The European Physical Journal B: Condensed Matter and Complex Systems, 2004, vol. 37, issue 1, 7-14

Abstract: We study the one-dimensional deformed t - t ′ - 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. Copyright EDP Sciences, Società Italiana di Fisica, Springer-Verlag 2004

Date: 2004
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DOI: 10.1140/epjb/e2004-00024-2

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