Slave-Fermion Mean Field Theory of the Hubbard Model
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概要
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A two-dimensional square-lattice Hubbard model is investigated. A slave-fermionformulation, in which the electron operator is expressed by a combination of hoseoperators for the spin freedom, and fermi operators for the charge freedom, is used.The phase diagram for the resonating valence bond (RVB) state is obtained. The RVBstate shows long-range antiferromagnetic order at T = 0, the period of which deviatesfrom that of the commensurate N<:el order as the system deviates from the half-filledcase.
- 社団法人日本物理学会の論文
- 1989-05-15
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