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cond-mat.supr-con2007★ 11 cited
Low-energy Effective Theory for One-dimensional Lattice Bosons near Integer Filling
Yu-Wen Lee, Yu-Li Lee, Min-Fong Yang
A low-energy effective theory for interacting bosons on a one-dimensional lattice at and near integer fillings is proposed. It is found that two sets of bosonic phase fields are ne…
cond-mat.str-el2007
Low-energy properties of the ferromagnetic metallic phase in manganites: Slave fermion approach to the quantum double exchange model
Yu-Li Lee, Yu-Wen Lee
We study the low energy properties of the one-orbital quantum double-exchange model by using the slave fermion formulation. We construct a mean-field theory which gives a simple ex…