PHASE SEPARATION IN THE TWO-DIMENSIONAL HUBBARD MODEL
2005 ◽
Vol 19
(01n03)
◽
pp. 299-302
◽
Keyword(s):
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.
1994 ◽
Vol 50
(24)
◽
pp. 17901-17909
◽
1998 ◽
Vol 58
(22)
◽
pp. R14685-R14688
◽
Keyword(s):
1998 ◽
Vol 58
(20)
◽
pp. 13506-13509
◽
1998 ◽
Vol 67
(5)
◽
pp. 1682-1687
◽
Keyword(s):
Spin- and charge-density waves in the Hartree–Fock ground state of the two-dimensional Hubbard model
2011 ◽
Vol 23
(50)
◽
pp. 505601
◽
Keyword(s):