Supersymmetric mean-field theory of the t-J model

Chi Ho Cheng, Tai Kai Ng

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Abstract

The supersymmetric formulation of the t-J model is studied in this paper at the mean-field level where the δ-T phase diagram is determined. We found that the slave-fermion-like spiral phase is stable at low doping concentration, and the slave-boson-like d-wave fermionic spin pairing state becomes energetically favourable when δ ≥ 0.23. An improvement in free energy using Gutzwiller's method lowers the transition doping concentration to δ ≃ 0.06. We also point out the existence of new branches of excitations in the supersymmetric theory.

Original languageEnglish
Pages (from-to)87-93
Number of pages7
JournalEurophysics Letters
Volume52
Issue number1
DOIs
Publication statusPublished - 2000 Oct 1

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All Science Journal Classification (ASJC) codes

  • Physics and Astronomy(all)

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