scholarly journals Effective pairing interaction in a system with an incipient band

2019 ◽  
Vol 99 (14) ◽  
Author(s):  
T. A. Maier ◽  
V. Mishra ◽  
G. Balduzzi ◽  
D. J. Scalapino
Keyword(s):  
Pairing Interaction ◽  
Effective Pairing Interaction ◽  
Effective Pairing

THE EFFECT OF CONFINEMENT ON THE CFL QUARK PAIRING IN THE CHROMODIELECTRIC MODEL

2010 ◽  
Vol 19 (08n10) ◽  
pp. 1737-1741
Author(s):  
S. M. DE CARVALHO ◽  
M. MALHEIRO ◽  
T. FREDERICO ◽  
B. V. CARLSON ◽  
M. FIOLHAIS ◽  
...  
Keyword(s):  
The Self ◽  
Confinement Effect ◽  
Leading Order ◽  
Color Superconductivity ◽  
Pairing Interaction ◽  
Vector Channel ◽  
Effective Lagrangian ◽  
Self Consistent ◽  
Effective Pairing Interaction ◽  
Effective Pairing

An effective Lagrangian for quark pairing in nonlinear chromodielectric models (CDM) is derived in the leading order. The effective pairing coupling depends explicitly on the confinement field, χ, of the CDM manifesting a confinement effect on color superconductivity. The self-consistent gap equations are constructed and solved for the color-flavor locked phase. The pairing coupling, for the quartic χ potential used in the calculations, is inversely proportional to the second power of the χ field and to the χ mass squared. In the chiral solution the quarks do not pair, but in the chiral breaking solution, where χ is small and the effective pairing interaction is stronger, it does show pairing. Our results indicate that the vector channel of the gap is weaker than the scalar one.

Semi-microscopic model for the effective pairing interaction in atomic nuclei

JETP Letters ◽  
2010 ◽  
Vol 92 (2) ◽  
pp. 75-79 ◽  
Author(s):  
S. S. Pankratov ◽  
M. Baldo ◽  
M. V. Zverev ◽  
U. Lombardo ◽  
E. E. Saperstein
Keyword(s):  
Microscopic Model ◽  
Pairing Interaction ◽  
Atomic Nuclei ◽  
Effective Pairing Interaction ◽  
Effective Pairing

Effective pairing interaction for the Argonne nucleon-nucleon potential v18

2007 ◽  
Vol 70 (4) ◽  
pp. 658-668 ◽  
Author(s):  
S. S. Pankratov ◽  
M. Baldo ◽  
U. Lombardo ◽  
E. E. Saperstein ◽  
M. V. Zverev
Keyword(s):  
Nucleon Nucleon ◽  
Pairing Interaction ◽  
Nucleon Potential ◽  
Effective Pairing Interaction ◽  
Effective Pairing

Symmetry of the Pairing State and Transition Temperature in the P-D Model

1999 ◽  
Vol 13 (09n10) ◽  
pp. 1201-1206 ◽  
Author(s):  
R. Citro ◽  
M. Marinaro
Keyword(s):  
Transition Temperature ◽  
Superconducting Transition Temperature ◽  
Experimental Results ◽  
Superconducting Transition ◽  
Cumulant Expansion ◽  
Pairing Interaction ◽  
Charge Fluctuations ◽  
D Model ◽  
Effective Pairing Interaction ◽  
Effective Pairing

The effective pairing interaction and the superconducting transition temperature Tc, mediated by both spin and charge fluctuations, are investigated on the basis of the simplest p - d model by considering a Bethe-Salpeter equation for the vertex functions within a generalized cumulant expansion. The comparison with experimental results of hole-doped cuprates is discussed.

Ground state superconducting pair correlations in twisted bilayer graphene

2019 ◽  
Vol 34 (01) ◽  
pp. 2050016 ◽  
Author(s):  
Lufeng Zhang ◽  
Tongyun Huang ◽  
Ying Liang ◽  
Tianxing Ma
Keyword(s):  
Ground State ◽  
Quantum Monte Carlo ◽  
Bilayer Graphene ◽  
Pairing Symmetry ◽  
Honeycomb Lattice ◽  
Magic Angle ◽  
Pairing Interaction ◽  
Twisted Bilayer Graphene ◽  
Effective Pairing Interaction ◽  
Effective Pairing

Motivated by the recent novel electronic features extracted from the magic-angle graphene superlattices, we studied the ground state superconducting pairing correlations within the Hubbard model on a twisted bilayer honeycomb lattice. Using Constrained-Path Quantum Monte Carlo method, we found that the [Formula: see text] pairing correlation dominates over other pairing patterns among various electron fillings and interaction strengths, and the effective pairing interaction was enhanced as the on-site Coulomb interaction increased. We further examined the effect of the nearest neighbor interaction [Formula: see text], and the effective pairing interaction with [Formula: see text] pairing symmetry was also enhanced by either a repulsive or attractive interaction. Our intensive numerical results confirm the interaction driven superconductivity with a dominant [Formula: see text] pairing symmetry in twisted bilayer graphene.

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