scholarly journals Charge fluctuations in two-dimensional quarter-filled extended Hubbard model on an anisotropic triangular lattice

2008 ◽  
Vol 132 ◽  
pp. 012020 ◽  
Author(s):  
T Nishine ◽  
M Tsuchiizu ◽  
Y Suzumura
Keyword(s):  
Hubbard Model ◽  
Triangular Lattice ◽  
Two Dimensional ◽  
Extended Hubbard Model ◽  
Charge Fluctuations

TWO-DIMENSIONAL QUARTER-FILLED EXTENDED HUBBARD MODEL AT STRONG COUPLING

2005 ◽  
Vol 19 (01n03) ◽  
pp. 213-216
Author(s):  
W. F. LEE ◽  
H. Q. LIN
Keyword(s):  
Hubbard Model ◽  
Correlation Functions ◽  
Nearest Neighbor ◽  
Spin Correlation ◽  
Perturbation Approach ◽  
Effective Hamiltonian ◽  
Two Dimensional ◽  
Extended Hubbard Model ◽  
Neighbor Interaction ◽  
Electron Hopping

In this paper, we generalized the perturbation approach to study the quasi-two-dimension extended Hubbard model. This model is characterizing by intra-chain electron hopping t, on-site Column interaction U, nearest-neighbor interaction V, and inter-chain electron hopping t′ and nearest-neighbor interaction V′. An effective Hamiltonian up to sixth-order in t/U, t/V, t/V′, t′/U, t′/V and t′/V′ expansion was obtained and the spin-spin correlation functions were calculated. We presented results for t=t′, V=V′.

Exact diagonalization study on the extended Hubbard model in an anisotropic triangular lattice

2008 ◽  
Vol 69 (12) ◽  
pp. 3334-3336 ◽  
Author(s):  
Ken Kanada ◽  
Tsutomu Watanabe ◽  
Seiichiro Onari ◽  
Yukio Tanaka
Keyword(s):  
Hubbard Model ◽  
Triangular Lattice ◽  
Exact Diagonalization ◽  
Extended Hubbard Model
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