Ionic Hubbard model on a triangular lattice forNa0.5CoO2,Rb0.5CoO2, andK0.5CoO2: Mean-field slave boson theory
نویسندگان
چکیده
منابع مشابه
Slave - boson mean - field theory of spin - and orbital - ordered states in the degenerate Hubbard model ∗
The mean-field theory with the use of the slave-boson functional method is generalized to take account of the spinand orbital-ordered state in the doubly degenerate Hubbard model. Some numerical calculations are presented of the antiferromagnetic orbital-ordered state in the half-filled simple-cubic model. The orbital order in the present theory is much reduced compared with that in the Hartree...
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ژورنال
عنوان ژورنال: Physical Review B
سال: 2009
ISSN: 1098-0121,1550-235X
DOI: 10.1103/physrevb.80.085113