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Supersymmetric Mean-Field Theory of t-J Model | | Chi-Ho Cheng
; T.K.Ng
; | | Date: |
11 Aug 1999 | | Journal: | Europhysics Letters 52, 87 (2000) DOI: 10.1209/epl/i2000-00408-4 | | Subject: | Superconductivity | cond-mat.supr-con | | Affiliation: | HKUST) and T.K.Ng (HKUST | | Abstract: | The supersymmetric formulation of t-J model is studied in this paper at the mean-field level where $delta$-T phase diagram is computed. We find that 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 $deltageq$ 0.23. An improvement in free energy using Gutzwiller’s method lowers the transition doping concentration to 0.06. We also point out the existence of new branches of excitations in the supersymmetric theory. | | Source: | arXiv, cond-mat/9908161 | | Services: | Forum | Review | PDF | Favorites | |
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