Authors: Tao Sun
A novel effective Hamiltonian in the subspace of singly occupied states is obtained by applying the Gutzwiller projection approach to a generalized Hubbard model with the interactions between two nearest-neighbor sites. This model provides a more complete description of the physics of strongly correlated electron systems. The system is not necessarily in a ferromagnetic state as temperature T->0 at any doping level. The system, however, must be in an antiferromagnetic state at the origin of the doping-temperature plane. Moreover, the model exhibits superconductivity in a doped region at sufficiently low temperatures. We summarize the studies and provide a phase diagram of the antiferromagnetism and the superconductivity of the model in the doping-temperature plane here. Details will be presented in subsequent papers.
Comments: 21 Pages.
[v1] 2017-03-02 19:56:35
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