Single Band Hubbard Model with Infinite Repulsion on 2×2×2 Lattice

1979 ◽  
Vol 47 (1) ◽  
pp. 47-55 ◽  
Author(s):  
Minoru Takahashi
Keyword(s):  
Hubbard Model ◽  
Single Band ◽  
Infinite Repulsion

PHASE SEPARATION IN THE TWO-DIMENSIONAL HUBBARD MODEL

2005 ◽  
Vol 19 (01n03) ◽  
pp. 299-302 ◽  
Author(s):  
M. YU ◽  
H. Q. LIN
Keyword(s):  
Phase Separation ◽  
Hubbard Model ◽  
Coulomb Interaction ◽  
Single Band ◽  
Study Phase ◽  
Two Dimensional ◽  
Stripe Phase ◽  
Hartree Fock ◽  
Band Filling

In this paper, we study phase separation in the two-dimensional single-band Hubbard model with the unrestricted Hartree-Fock(UHF) method and the restricted Hartree-Fock (RHF) method. We perform the calculation for square lattices and rectangle lattices. It is observed that the stripe phase exists and it depends on three aspects: geometry of the lattice, Coulomb interaction U and band filling n. To gain more physical insights, we consider the Hubbard model with spin dependent hoppings: t↑ and t↓, and study the effect of varying [Formula: see text] on the phase separation.

scholarly journals One-particle spectral weight of the three-dimensional single-band Hubbard model

1996 ◽  
Vol 54 (23) ◽  
pp. 16523-16532 ◽  
Author(s):  
M. Ulmke ◽  
R. T. Scalettar ◽  
A. Nazarenko ◽  
E. Dagotto
Keyword(s):  
Hubbard Model ◽  
Three Dimensional ◽  
Spectral Weight ◽  
Single Band
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