Group-theoretical and resonating Hartree-Fock studies for spin fluctuations in two-dimensional Hubbard model on triangular lattice

2011 ◽  
Vol 84 (24) ◽  
Author(s):  
Fumikazu Satoh ◽  
Masa-aki Ozaki ◽  
Takaaki Maruyama ◽  
Norikazu Tomita
Keyword(s):  
Hubbard Model ◽  
Triangular Lattice ◽  
Spin Fluctuations ◽  
Two Dimensional ◽  
Hartree Fock

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 Tracking the Footprints of Spin Fluctuations: A MultiMethod, MultiMessenger Study of the Two-Dimensional Hubbard Model

2021 ◽  
Vol 11 (1) ◽  
Author(s):  
Thomas Schäfer ◽  
Nils Wentzell ◽  
Fedor Šimkovic ◽  
Yuan-Yao He ◽  
Cornelia Hille ◽  
...  
Keyword(s):  
Hubbard Model ◽  
Spin Fluctuations ◽  
Two Dimensional

Phase diagram of the two-dimensional extended Hubbard model: pairing from charge and spin fluctuations

2005 ◽  
Vol 359-361 ◽  
pp. 518-520
Author(s):  
Seiichiro Onari ◽  
Ryotaro Arita ◽  
Kazuhiko Kuroki ◽  
Hideo Aoki
Keyword(s):  
Phase Diagram ◽  
Hubbard Model ◽  
Spin Fluctuations ◽  
Two Dimensional ◽  
Extended Hubbard Model
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