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cond-mat.str-el2008★ 20 cited
A Possible Phase Transition in beta-pyrochlore Compounds
Kazumasa Hattori, Hirokazu Tsunetsugu
We investigate a lattice of interacting anharmonic oscillators by using a mean field theory and exact diagonalization. We construct an effective five-state hopping model with inter…
cond-mat.str-el2008★ 16 cited
Effective Hamiltonian of Three-orbital Hubbard Model on Pyrochlore Lattice: Application to LiV_2O_4
Kazumasa Hattori, Hirokazu Tsunetsugu
We investigate heavy fermion behaviors in the vanadium spinel LiV_2O_4. We start from a three-orbital Hubbard model on the pyrochlore lattice and derive its low-energy effective Ha…