EXACT GROUND STATE OF THE GENERALIZED HUBBARD MODEL FOR A WIDE RANGE OF PARAMETERS

1993 ◽  
Vol 07 (21) ◽  
pp. 1397-1405 ◽  
Author(s):  
A. A. OVCHINNIKOV
Keyword(s):  
Hubbard Model ◽  
Ground State ◽  
Occupied Site ◽  
Metal Insulator Transition ◽  
Metal Insulator ◽  
Exact Ground State ◽  
Wide Range ◽  
Ferromagnetic Ground State ◽  
Generalized Hubbard Model ◽  
Relevant Range

We present the exact ground-state wave function and energy of the generalized Hubbard model, subjected to the condition that the number of doubly-occupied sites is conserved for a wide physically relevant range of parameters. For one hole and one doubly-occupied site, the existence of the ferromagnetic ground state is proved which allows one to determine the critical value of the on-site repulsion corresponding to the point of metal–insulator transition.

Single-particle spectral function of a generalized Hubbard model: Metal-insulator transition

1995 ◽  
Vol 51 (20) ◽  
pp. 14012-14019 ◽  
Author(s):  
E. R. Gagliano ◽  
A. A. Aligia ◽  
Liliana Arrachea ◽  
Michel Avignon
Keyword(s):  
Hubbard Model ◽  
Spectral Function ◽  
Single Particle ◽  
Insulator Transition ◽  
Metal Insulator Transition ◽  
Metal Insulator ◽  
Generalized Hubbard Model

scholarly journals Metal-insulator transition in a generalized Hubbard model

1992 ◽  
Vol 68 (9) ◽  
pp. 1410-1413 ◽  
Author(s):  
K. Michielsen ◽  
H. De Raedt ◽  
T. Schneider
Keyword(s):  
Hubbard Model ◽  
Insulator Transition ◽  
Metal Insulator Transition ◽  
Metal Insulator ◽  
Generalized Hubbard Model

Exact ground-state behavior of a four-atom generalized Hubbard model

1981 ◽  
Vol 24 (9) ◽  
pp. 5299-5304 ◽  
Author(s):  
J. Rössler ◽  
B. Fernández ◽  
M. Kiwi
Keyword(s):  
Hubbard Model ◽  
Ground State ◽  
State Behavior ◽  
Exact Ground State ◽  
Generalized Hubbard Model
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