Lu Yu

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cond-mat.str-el2005

Spin and quadruple correlations in the insulating nematic phase of spin-1 bosons on optical lattices

Guang-Ming Zhang, Lu Yu

We consider the effective model of $H = - J_{1} \sum_{< i, j >} S_{i} \cdot S_{j} - J_{2} \sum_{< i, j >} (S_{i} \cdot S_{j})^{2}$ , describing the Mott insulati…

cond-mat.str-el2004

Local quantum critical behavior in magnetic Kondo impurity models with partially screened moment

Guang-Ming Zhang, Lu Yu

In the strong coupling limit, an effective resonant level model is derived for the spin-1 underscreened Kondo impurity model. A local quantum critical behavior is induced by the fo…