Bipolaron phase diagram of the 1D adiabatic Holstein–Hubbard model in the strong coupling limit

2006 ◽  
Vol 216 (1) ◽  
pp. 207-213 ◽  
Author(s):  
J. Dorignac ◽  
J. Zhou ◽  
D.K. Campbell
Keyword(s):  
Phase Diagram ◽  
Hubbard Model ◽  
Strong Coupling ◽  
Strong Coupling Limit

Thermodynamics of an extended Hubbard-model chain. II. Strong-coupling limit

1975 ◽  
Vol 11 (11) ◽  
pp. 4421-4426 ◽  
Author(s):  
J.-P. Gallinar
Keyword(s):  
Hubbard Model ◽  
Strong Coupling ◽  
Strong Coupling Limit ◽  
Extended Hubbard Model ◽  
Model Chain

η-PAIRING SUPERCONDUCTIVITY IN THE NEGATIVE-U HUBBARD MODEL: EFFECT OF FLUCTUATIONS AND DISORDER

1994 ◽  
Vol 08 (15) ◽  
pp. 2041-2058
Author(s):  
JÜRGEN STEIN
Keyword(s):  
Phase Diagram ◽  
Asymptotic Expansion ◽  
Hubbard Model ◽  
Strong Coupling ◽  
Mean Field ◽  
Higher Order ◽  
Field Phase ◽  
Effective Pair ◽  
The Mean ◽  
Pair Hopping

We have studied the influence of singular fluctuations around the mean-field solution as well as higher order contributions to the geometry controlled asymptotic expansion of the propagators on η-pairing superconductivity in the strong coupling negative-U Hubbard model in the presence of unpaired electrons. The modifications of the mean-field results due to the introduction of disorder and allowance for finite U are also calculated. Besides the singularities already present in the O(2) nonlinear σ-model we find a filling-depending singular depression of the repulsive effective pair-hopping interaction which strongly alters the mean-field phase diagram and appears to suppress the η-pairing phase near the band edges.

Quasi-Particles in the Strong-Coupling Limit of the 2D Hubbard Model

1990 ◽  
Vol 11 (7) ◽  
pp. 675-680 ◽  
Author(s):  
W Stephan ◽  
K. J. von Szczepanski ◽  
M Ziegler ◽  
P Horsch
Keyword(s):  
Hubbard Model ◽  
Strong Coupling ◽  
Strong Coupling Limit

Charge collective modes and dynamic pairing in the three-band Hubbard model. II. Strong-coupling limit

1993 ◽  
Vol 47 (6) ◽  
pp. 3331-3346 ◽  
Author(s):  
R. Raimondi ◽  
C. Castellani ◽  
M. Grilli ◽  
Yunkyu Bang ◽  
G. Kotliar
Keyword(s):  
Hubbard Model ◽  
Strong Coupling ◽  
Strong Coupling Limit ◽  
Collective Modes

The one-dimensional doubly degenerate Hubbard model in the strong-coupling limit

1976 ◽  
Vol 9 (20) ◽  
pp. 3789-3797 ◽  
Author(s):  
C Lacroix-Lyon-Caen ◽  
M Cyrot
Keyword(s):  
Hubbard Model ◽  
Strong Coupling ◽  
Strong Coupling Limit ◽  
One Dimensional ◽  
The One

Phase diagram of frustrated mixed-spin ladders in the strong-coupling limit

2007 ◽  
Vol 57 (3) ◽  
pp. 265-270
Author(s):  
S. Chen ◽  
L. Wang ◽  
Y. P. Wang
Keyword(s):  
Phase Diagram ◽  
Strong Coupling ◽  
Strong Coupling Limit ◽  
Mixed Spin

scholarly journals Strong Coupling Limit of the Holstein-Hubbard Model

2020 ◽  
Vol 125 (16) ◽  
Author(s):  
Zhaoyu Han ◽  
Steven A. Kivelson ◽  
Hong Yao
Keyword(s):  
Hubbard Model ◽  
Strong Coupling ◽  
Strong Coupling Limit
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