5 citations · 5 across the 1 of their papers we have counts for
3 papers
cond-mat.str-el2008★ 5 cited
Mott insulating state in a quarter-filled two-orbital Hubbard chain with different bandwidths
S. Miyashita, Y. Yamashita, K. Yonemitsu +2
We investigate the ground-state properties of the one-dimensional two-band Hubbard model with different bandwidths. The density-matrix renormalization group method is applied to ca…
cond-mat.str-el2005
Effective Interaction between the inter-penetrating Kagome lattices in Na_xCoO_2
Martin Indergand, Yasufumi Yamashita, Hiroaki Kusunose +1
A multi-orbital model for a CoO_2-layer in Na_xCoO_2 is derived. In this model the kinetic energy for the degenerate t_2g-orbitals is given by indirect hopping over oxygen, leading…
cond-mat.str-el2002
Spin-Orbital Fluctuations and a large mass enhancement in LiV_2O_4
Yasufumi Yamashita, Kazuo Ueda
We present a scenario that the multi-component fluctuations, especially those of the spin-orbital coupled modes, lead to the mass enhancement observed in LiV_2O_4. This phenomena i…