Supersymmetric Mean-Field Theory of t-J Model
Abstract
Description
The supersymmetric formulation of t-J model is studied in this paper at the mean-field level where $δ$-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 $δ\geq$ 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.
11 pages and 2 figures
11 pages and 2 figures