Bulk limit of superconducting condensation energy in 2D Hubbard model

2000 ◽  
Vol 284-288 ◽  
pp. 415-416 ◽  
Author(s):  
K Yamaji
Keyword(s):  
Hubbard Model ◽  
Condensation Energy

Superconducting condensation energy computed for the 2D Hubbard model with Bi2212-type band

2006 ◽  
Vol 445-448 ◽  
pp. 171-174 ◽  
Author(s):  
K. Yamaji ◽  
T. Yanagisawa ◽  
M. Miyazaki
Keyword(s):  
Hubbard Model ◽  
Condensation Energy ◽  
Type Band

scholarly journals t′- and t″-dependence of the bulk-limit superconducting condensation energy of the 2D Hubbard model

2008 ◽  
Vol 468 (15-20) ◽  
pp. 1125-1128 ◽  
Author(s):  
K. Yamaji ◽  
T. Yanagisawa ◽  
M. Miyazaki ◽  
R. Kadono
Keyword(s):  
Hubbard Model ◽  
Condensation Energy

scholarly journals Interplay Between Condensation Energy, Pseudogap, and the Specific Heat of a Hubbard Model in a $$n$$ n -Pole Approximation

2014 ◽  
Vol 179 (1-2) ◽  
pp. 94-100
Author(s):  
A. C. Lausmann ◽  
E. J. Calegari ◽  
S. G. Magalhaes ◽  
C. M. Chaves ◽  
A. Troper
Keyword(s):  
Hubbard Model ◽  
Specific Heat ◽  
Pole Approximation ◽  
Condensation Energy

scholarly journals On the Kinetic Energy Driven Superconductivity in the Two-Dimensional Hubbard Model

2021 ◽  
Vol 6 (1) ◽  
pp. 12
Author(s):  
Takashi Yanagisawa ◽  
Kunihiko Yamaji ◽  
Mitake Miyazaki
Keyword(s):  
Wave Function ◽  
Kinetic Energy ◽  
Hubbard Model ◽  
High Temperature Superconductivity ◽  
Repulsive Interaction ◽  
Two Dimensional ◽  
Condensation Energy ◽  
Energy Effect ◽  
Correlation Operator ◽  
Correlated Electron

We investigate the role of kinetic energy for the stability of superconducting state in the two-dimensional Hubbard model on the basis of an optimization variational Monte Carlo method. The wave function is optimized by multiplying by correlation operators of site off-diagonal type. This wave function is written in an exponential-type form given as ψλ=exp(−λK)ψG for the Gutzwiller wave function ψG and a kinetic operator K. The kinetic correlation operator exp(−λK) plays an important role in the emergence of superconductivity in large-U region of the two-dimensional Hubbard model, where U is the on-site Coulomb repulsive interaction. We show that the superconducting condensation energy mainly originates from the kinetic energy in the strongly correlated region. This may indicate a possibility of high-temperature superconductivity due to the kinetic energy effect in correlated electron systems.

Superconducting Condensation Energy of the Two-Chain Hubbard Model in the Bulk Limit

2000 ◽  
Vol 69 (7) ◽  
pp. 2199-2208 ◽  
Author(s):  
Soh Koike ◽  
Kunihiko Yamaji ◽  
Takashi Yanagisawa
Keyword(s):  
Hubbard Model ◽  
Condensation Energy

scholarly journals Superconducting Condensation Energy of the Two-Dimensional Hubbard Model in the Large-Negative-t' Region

2011 ◽  
Vol 80 (8) ◽  
pp. 083702 ◽  
Author(s):  
Kunihiko Yamaji ◽  
Takashi Yanagisawa ◽  
Mitake Miyazaki ◽  
Ryosuke Kadono
Keyword(s):  
Hubbard Model ◽  
Two Dimensional ◽  
Condensation Energy

Parameter-dependences of superconducting condensation energy of 2D Hubbard model

2003 ◽  
Vol 392-396 ◽  
pp. 229-233 ◽  
Author(s):  
K. Yamaji ◽  
S. Koike ◽  
M. Miyazaki ◽  
T. Yanagisawa
Keyword(s):  
Hubbard Model ◽  
Condensation Energy
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