Metallic ferromagnetism in a single-band model: Effect of band filling and Coulomb interactions

1996 ◽  
Vol 54 (9) ◽  
pp. 6364-6375 ◽  
Author(s):  
J. C. Amadon ◽  
J. E. Hirsch
Keyword(s):  
Single Band ◽  
Band Model ◽  
Coulomb Interactions ◽  
Band Filling ◽  
Metallic Ferromagnetism

Metallic ferromagnetism in a single-band model

1989 ◽  
Vol 40 (4) ◽  
pp. 2354-2361 ◽  
Author(s):  
J. E. Hirsch
Keyword(s):  
Single Band ◽  
Band Model ◽  
Metallic Ferromagnetism

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.

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