Narrow-Band Expansions in the Hubbard Model: A Comment

1970 ◽  
Vol 2 (6) ◽  
pp. 2260-2261 ◽  
Author(s):  
Robert A. Bari
Keyword(s):  
Hubbard Model ◽  
Narrow Band

T = 0 phase diagram of the 1D Hubbard model with magnetic interactions in the narrow band limit

Open Physics ◽  
2012 ◽  
Vol 10 (3) ◽  
Author(s):  
Ferdinando Mancini ◽  
Evgeny Plekhanov ◽  
Gerardo Sica
Keyword(s):  
Phase Diagram ◽  
Hubbard Model ◽  
Narrow Band ◽  
Operator Method ◽  
Magnetic Interactions ◽  
Exchange Constant ◽  
Local Charge ◽  
Spin Interactions ◽  
Charge Interaction ◽  
Composite Operator Method

AbstractIn this paper we study a generalization of the Hubbard model by considering spin-spin interactions described by the exchange constant J. An external magnetic field his also taken into account. In the narrowband limit and for the 1D case, we present the exact solution obtained in the framework of the Green’s function formalism, using the Composite Operator Method. We report the T = 0 phase diagram for both ferro (J > 0) and anti-ferro (J < 0) couplings. The competition of the different energy scales (U, J, and h; being U the local charge interaction) generates a variety of phases and different charge and spin orderings.

The Hubbard model: Insulator or conductor for narrow band regime?

1969 ◽  
Vol 30 (7) ◽  
pp. 418-419 ◽  
Author(s):  
R.A. Bari ◽  
R.V. Lange
Keyword(s):  
Hubbard Model ◽  
Narrow Band

Comment on 'narrow band solution to the Hubbard model'

1971 ◽  
Vol 4 (15) ◽  
pp. 2432-2432
Author(s):  
J A Blackman ◽  
D M Esterling
Keyword(s):  
Hubbard Model ◽  
Narrow Band

Polaron conductivity in the narrow-band Hubbard model

1991 ◽  
Vol 44 (13) ◽  
pp. 7127-7130 ◽  
Author(s):  
Y. Y. Suzuki ◽  
P. Pincus ◽  
A. J. Heeger
Keyword(s):  
Hubbard Model ◽  
Narrow Band

Comment on 'narrow band solution to the Hubbard model'

1971 ◽  
Vol 4 (11) ◽  
pp. L238-L239 ◽  
Author(s):  
J A Blackman ◽  
D M Esterling
Keyword(s):  
Hubbard Model ◽  
Narrow Band
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