Spin-gap phase in the extended t - J chain

Yu Wen Lee, Yu-Li Lee

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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.

Original languageEnglish
Pages (from-to)7-14
Number of pages8
JournalEuropean Physical Journal B
Volume37
Issue number1
DOIs
Publication statusPublished - 2004 Jan 1

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All Science Journal Classification (ASJC) codes

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics

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