Supersymmetric mean-field theory of the t-J model

Chi-Ho Cheng, Tai Kai Ng

Research output: Contribution to journalArticle

3 Citations (Scopus)

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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magnons
bosons
fermions
free energy
phase diagrams
formulations
excitation

All Science Journal Classification (ASJC) codes

  • Physics and Astronomy(all)

Cite this

Cheng, Chi-Ho ; Ng, Tai Kai. / Supersymmetric mean-field theory of the t-J model. In: Europhysics Letters. 2000 ; Vol. 52, No. 1. pp. 87-93.
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Supersymmetric mean-field theory of the t-J model. / Cheng, Chi-Ho; Ng, Tai Kai.

In: Europhysics Letters, Vol. 52, No. 1, 01.10.2000, p. 87-93.

Research output: Contribution to journalArticle

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