Normal state properties of the attractive Hubbard model: moment approach

1996 ◽  
Vol 100 (2) ◽  
pp. 263-276 ◽  
Author(s):  
T. Schneider ◽  
M.H. Pedersen ◽  
J.J. Rodríguez-Nuñez
Keyword(s):  
Hubbard Model ◽  
Normal State ◽  
Normal State Properties ◽  
Attractive Hubbard Model ◽  
Moment Approach

scholarly journals Moment approach for the 2D attractive Hubbard model

1996 ◽  
Vol 232 (1-2) ◽  
pp. 408-416 ◽  
Author(s):  
J.J. Rodríguez-Núñez ◽  
C.E. Cordeiro ◽  
A. Delfino
Keyword(s):  
Hubbard Model ◽  
Attractive Hubbard Model ◽  
Moment Approach

FIRST-ORDER PAIRING TRANSITION AND PHASE SEPARATION IN THE ATTRACTIVE HUBBARD MODEL

2003 ◽  
Vol 17 (04n06) ◽  
pp. 590-596
Author(s):  
M. CAPONE ◽  
C. CASTELLANI ◽  
M. GRILLI
Keyword(s):  
Phase Separation ◽  
Hubbard Model ◽  
Mean Field Theory ◽  
Mean Field ◽  
First Order ◽  
Symmetric Subspace ◽  
Normal State Properties ◽  
First Order Transition ◽  
Attractive Hubbard Model ◽  
Two Phases

The normal state properties of the Hubbard model are studied by means of the Dynamical Mean-Field Theory. Even in the gauge-symmetric subspace, a first-order transition occurs between a Fermi-liquid phase and a strong-coupling bound-pairs phase, which can be thought as a "disordered" superconductor. The transition is of first order for all densities different from n = 1, and it is accompanied by a region of phase separation between the two phases at different densities.

STABLE hc/e VORTICES IN SUPERCONDUCTORS WITH SPIN-CHARGE SEPARATION

1992 ◽  
Vol 06 (05n06) ◽  
pp. 509-526
Author(s):  
Subir Sachdev
Keyword(s):  
Magnetic Field ◽  
Magnetic Flux ◽  
Normal State ◽  
Phenomenological Model ◽  
Charge Separation ◽  
Cuprate Superconductors ◽  
Superconducting Phase ◽  
Low Energy ◽  
Large N ◽  
Normal State Properties

A phenomenological model, F, of the superconducting phase of systems with spin-charge separation and antiferromagnetically induced pairing is studied. Above Hc1, magnetic flux can always pierce the superconductor in vortices with flux hc/2e, but regimes are found in which vortices with flux hc/e are preferred. Little-Park and other experiments, which examine periodicities with a varying magnetic field, always observe a period of hc/2e. The low energy properties of a symplectic large-N expansion of a model of the cuprate superconductors are argued to be well described by F. This analysis and some normal state properties of the cuprates suggest that hc/e vortices should be stable at the lowest dopings away from the insulating state at which superconductivity first occurs.

Normal-state properties of BEDT-TTF compounds and the superconductivity pairing mechanism

2000 ◽  
Vol 62 (9) ◽  
pp. 5957-5964 ◽  
Author(s):  
R. Louati ◽  
S. Charfi-Kaddour ◽  
A. Ben Ali ◽  
R. Bennaceur ◽  
M. Héritier
Keyword(s):  
Normal State ◽  
Pairing Mechanism ◽  
Normal State Properties

scholarly journals Electrodynamics of electron-doped iron pnictide superconductors: Normal-state properties

2010 ◽  
Vol 82 (5) ◽  
Author(s):  
N. Barišić ◽  
D. Wu ◽  
M. Dressel ◽  
L. J. Li ◽  
G. H. Cao ◽  
...  
Keyword(s):  
Normal State ◽  
Iron Pnictide ◽  
Pnictide Superconductors ◽  
Normal State Properties
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