scholarly journals The High Temperature Series for the Single-Band Hubbard Model in the Strong Correlation Limit. II

1984 ◽  
Vol 71 (3) ◽  
pp. 479-486 ◽  
Author(s):  
K. Kubo ◽  
M. Tada
Keyword(s):  
High Temperature ◽  
Hubbard Model ◽  
Strong Correlation ◽  
Temperature Series ◽  
Single Band

High-temperature series expansions for the Hubbard model

1992 ◽  
Vol 46 (10) ◽  
pp. 6313-6327 ◽  
Author(s):  
D. F. B. ten Haaf ◽  
J. M. J. van Leeuwen
Keyword(s):  
High Temperature ◽  
Hubbard Model ◽  
Temperature Series ◽  
Series Expansions

High-temperature expansion for the single-band Hubbard model

1992 ◽  
Vol 46 (10) ◽  
pp. 6328-6337 ◽  
Author(s):  
J. A. Henderson ◽  
J. Oitmaa ◽  
M. C. B. Ashley
Keyword(s):  
High Temperature ◽  
Hubbard Model ◽  
Single Band ◽  
Temperature Expansion ◽  
High Temperature Expansion

High-temperature series expansion for the extended Hubbard model

1995 ◽  
Vol 51 (20) ◽  
pp. 14077-14084 ◽  
Author(s):  
M. Bartkowiak ◽  
J. A. Henderson ◽  
J. Oitmaa ◽  
P. E. de Brito
Keyword(s):  
High Temperature ◽  
Hubbard Model ◽  
Series Expansion ◽  
Temperature Series ◽  
Extended Hubbard Model

scholarly journals Orbital structure of the effective pairing interaction in the high-temperature superconducting cuprates

2021 ◽  
Vol 6 (1) ◽  
Author(s):  
Peizhi Mai ◽  
Giovanni Balduzzi ◽  
Steven Johnston ◽  
Thomas A. Maier
Keyword(s):  
High Temperature ◽  
Hubbard Model ◽  
Quantum Monte Carlo ◽  
Degrees Of Freedom ◽  
Strong Support ◽  
Single Band ◽  
Orbital Structure ◽  
Pairing Interaction ◽  
Superconducting Cuprates ◽  
High Temperature Superconducting

AbstractThe nature of the effective interaction responsible for pairing in the high-temperature superconducting cuprates remains unsettled. This question has been studied extensively using the simplified single-band Hubbard model, which does not explicitly consider the orbital degrees of freedom of the relevant CuO2 planes. Here, we use a dynamical cluster quantum Monte Carlo approximation to study the orbital structure of the pairing interaction in the three-band Hubbard model, which treats the orbital degrees of freedom explicitly. We find that the interaction predominately acts between neighboring copper orbitals, but with significant additional weight appearing on the surrounding bonding molecular oxygen orbitals. By explicitly comparing these results to those from the simpler single-band Hubbard model, our study provides strong support for the single-band framework for describing superconductivity in the cuprates.

SUPERCONDUCTIVITY IN THE NEARLY HALF–FILLED HUBBARD MODEL WITH STRONG ON SITE CORRELATION

1988 ◽  
Vol 02 (05) ◽  
pp. 567-575 ◽  
Author(s):  
A. N. Das ◽  
P. Choudhury ◽  
B. Ghosh
Keyword(s):  
High Temperature ◽  
Transition Temperature ◽  
Hubbard Model ◽  
Density Of States ◽  
Fermi Energy ◽  
Strong Correlation ◽  
Superconducting Transition Temperature ◽  
Hole Concentration ◽  
Oxide Superconductors ◽  
Superconducting Transition

Superconductivity in a nearly half-filled Hubbard model with large on-site repulsion has been studied following the Hubbard's approximation. At T = 0, the Fermi energy touches the top of the lower Hubbard subband for n = 1, one electron per site in the system. For a particular density of states, sharply peaked at the centre of the band, the superconducting transition temperature is zero for n = 1 (zero hole concentration) and becomes maximum at a hole concentration of 1/3. The high temperature thermoelectric power of the oxide superconductors has been discussed, which indicates the strong correlation in the system.

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