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 language | English |
|---|---|
| Pages (from-to) | 87-93 |
| Number of pages | 7 |
| Journal | Europhysics Letters |
| Volume | 52 |
| Issue number | 1 |
| DOIs | |
| Publication status | Published - 2000 Oct 1 |
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All Science Journal Classification (ASJC) codes
- Physics and Astronomy(all)
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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 journal › Article
TY - JOUR
T1 - Supersymmetric mean-field theory of the t-J model
AU - Cheng, Chi Ho
AU - Ng, Tai Kai
PY - 2000/10/1
Y1 - 2000/10/1
N2 - 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.
AB - 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.
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UR - http://www.scopus.com/inward/citedby.url?scp=0034287134&partnerID=8YFLogxK
U2 - 10.1209/epl/i2000-00408-4
DO - 10.1209/epl/i2000-00408-4
M3 - Article
AN - SCOPUS:0034287134
VL - 52
SP - 87
EP - 93
JO - Europhysics Letters
JF - Europhysics Letters
SN - 0295-5075
IS - 1
ER -