scholarly journals Metal-insulator transition in the half-filling two-orbital Hubbard model on the triangular lattice

2008 ◽  
Vol 77 (12) ◽  
Author(s):  
Feng Lu ◽  
Wei-Hua Wang ◽  
Liang-Jian Zou
Keyword(s):  
Hubbard Model ◽  
Triangular Lattice ◽  
Insulator Transition ◽  
Metal Insulator Transition ◽  
Metal Insulator ◽  
Half Filling

Metal-Insulator Transition in the Hubbard Model on a Triangular Lattice

1991 ◽  
Vol 15 (6) ◽  
pp. 625-630 ◽  
Author(s):  
C Jayaprakash ◽  
H. R Krishnamurthy ◽  
S Sarker ◽  
W Wenzel
Keyword(s):  
Hubbard Model ◽  
Triangular Lattice ◽  
Insulator Transition ◽  
Metal Insulator Transition ◽  
Metal Insulator

METAL-INSULATOR TRANSITION IN THE HUBBARD MODEL

1996 ◽  
Vol 10 (18) ◽  
pp. 863-871
Author(s):  
ARIANNA MONTORSI ◽  
MARIO RASETTI
Keyword(s):  
Hubbard Model ◽  
Ground State ◽  
Insulator Transition ◽  
Full Model ◽  
Dimensional Model ◽  
Metal Insulator Transition ◽  
Metal Insulator ◽  
One Dimensional ◽  
Half Filling ◽  
The One

We study the metal-insulator transition of the d-dimensional Hubbard model by treating the hopping term between adjacent 1-d chains in the frame of a Clifford linearization scheme, and keeping the full model along the chains. A general equation for the critical point is worked out in terms of the correlation functions of the one-dimensional model, assuming that the transition is of the second order. The equation, which holds at any temperature, is here investigated especially at T=0, where the latter condition holds true. The solution shows the existence of an insulating ground state in any d only at half-filling for U strictly positive, as in the exact 1-d case. The transition is found to be related to a parameter reminiscent of entropy.

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