The suppression of singlet-pairing ODLRO in the one or two dimensional extended Hubbard model

1988 ◽  
Vol 67 (12) ◽  
pp. 1157-1159 ◽  
Author(s):  
K.P. Jain ◽  
C.C. Chancey
Keyword(s):  
Hubbard Model ◽  
Two Dimensional ◽  
Extended Hubbard Model ◽  
The One

The Phase Diagram of the One-Dimensional Extended Hubbard Model

1995 ◽  
pp. 315-326 ◽  
Author(s):  
H. Q. Lin ◽  
E. R. Gagliano ◽  
D. K. Campbell ◽  
E. H. Fradkin ◽  
J. E. Gubernatis
Keyword(s):  
Phase Diagram ◽  
Hubbard Model ◽  
Extended Hubbard Model ◽  
One Dimensional ◽  
The One

Condensation transition in the one-dimensional extended Hubbard model

1986 ◽  
Vol 33 (12) ◽  
pp. 8155-8163 ◽  
Author(s):  
H. Q. Lin ◽  
J. E. Hirsch
Keyword(s):  
Hubbard Model ◽  
Extended Hubbard Model ◽  
One Dimensional ◽  
The One

scholarly journals Charge Ordering under a Magnetic Field in the Extended Hubbard Model

2003 ◽  
Vol 17 (20n21) ◽  
pp. 1103-1110
Author(s):  
Duc Anh Le ◽  
Anh Tuan Hoang ◽  
Toan Thang Nguyen
Keyword(s):  
Magnetic Field ◽  
Critical Temperature ◽  
Hubbard Model ◽  
Charge Ordering ◽  
Coherent Potential Approximation ◽  
Extended Hubbard Model ◽  
Potential Approximation ◽  
Relative Variation ◽  
Band Filling ◽  
The One

We study the charge ordering behavior under magnetic field H in the extended Hubbard model within the coherent potential approximation. At quarter filling, for small H we find that the relative variation of critical temperature is quadratic with the coefficient α smaller than the one for conventional spin-Peierls systems. For intermediate fields, a melting of the charge ordering on decreasing temperature under fixed H at various band filling is found.

TWO-DIMENSIONAL QUARTER-FILLED EXTENDED HUBBARD MODEL AT STRONG COUPLING

2005 ◽  
Vol 19 (01n03) ◽  
pp. 213-216
Author(s):  
W. F. LEE ◽  
H. Q. LIN
Keyword(s):  
Hubbard Model ◽  
Correlation Functions ◽  
Nearest Neighbor ◽  
Spin Correlation ◽  
Perturbation Approach ◽  
Effective Hamiltonian ◽  
Two Dimensional ◽  
Extended Hubbard Model ◽  
Neighbor Interaction ◽  
Electron Hopping

In this paper, we generalized the perturbation approach to study the quasi-two-dimension extended Hubbard model. This model is characterizing by intra-chain electron hopping t, on-site Column interaction U, nearest-neighbor interaction V, and inter-chain electron hopping t′ and nearest-neighbor interaction V′. An effective Hamiltonian up to sixth-order in t/U, t/V, t/V′, t′/U, t′/V and t′/V′ expansion was obtained and the spin-spin correlation functions were calculated. We presented results for t=t′, V=V′.

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