scholarly journals Ground State Phase Diagrams of the Extended Hubbard Model with Repulsive Pair-Hopping Interaction for Nonfrustrated 2D Lattice

2015 ◽  
Vol 127 (2) ◽  
pp. 275-277 ◽  
Author(s):  
W.R. Czart ◽  
S. Robaszkiewicz
Keyword(s):  
Hubbard Model ◽  
Phase Diagrams ◽  
Ground State ◽  
Extended Hubbard Model ◽  
Pair Hopping

Rigorous eta -pairing ground state in an extended Hubbard model

1995 ◽  
Vol 28 (12) ◽  
pp. 3417-3420
Author(s):  
Z J Wang ◽  
X M Qiu ◽  
X B Zhou
Keyword(s):  
Hubbard Model ◽  
Ground State ◽  
Extended Hubbard Model

GROUND STATE OF THE 2D EXTENDED HUBBARD MODEL WITH MORE THAN NEAREST-NEIGHBOR INTERACTIONS

2012 ◽  
Vol 26 (29) ◽  
pp. 1250156 ◽  
Author(s):  
S. HARIR ◽  
M. BENNAI ◽  
Y. BOUGHALEB
Keyword(s):  
Phase Diagram ◽  
Hubbard Model ◽  
Ground State ◽  
State Energy ◽  
Nearest Neighbor ◽  
Finite Size ◽  
Square Lattice ◽  
Extended Hubbard Model ◽  
Eigenvalues And Eigenvectors ◽  
Repulsion Energy

We investigate the ground state phase diagram of the two dimensional Extended Hubbard Model (EHM) with more than Nearest-Neighbor (NN) interactions for finite size system at low concentration. This EHM is solved analytically for finite square lattice at one-eighth filling. All eigenvalues and eigenvectors are given as a function of the on-site repulsion energy U and the off-site interaction energy Vij. The behavior of the ground state energy exhibits the emergence of phase diagram. The obtained results clearly underline that interactions exceeding NN distances in range can significantly influence the emergence of the ground state conductor–insulator transition.

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