Jan, 2001
Mott transition and superconductivity in the two-band Hubbard model in infinite dimensions
JOURNAL OF PHYSICS AND CHEMISTRY OF SOLIDS
- ,
- Volume
- 62
- Number
- 1-2
- First page
- 285
- Last page
- 288
- Language
- English
- Publishing type
- Research paper (scientific journal)
- DOI
- 10.1016/S0022-3697(00)00147-5
- Publisher
- PERGAMON-ELSEVIER SCIENCE LTD
Electronic states in the two-band Hubbard model with infinite dimensions are investigated by using the exact diagonalization method. In the half-filled case, the boundary separating the metallic and the insulating regimes is calculated as the function of the on-site repulsive interaction U and the charge-transfer energy Delta. The metal-insulator transition of Mott-Hubbard type is obtained for U < <Delta> while that of charge-transfer type is obtained for U > Delta. In the doped case, on-site paring susceptibility is calculated at finite temperature. The critical temperature of the superconductivity is found in a charge-transfer type but not in a Mott-Hubbard type. (C) 2000 Elsevier Science Ltd. All rights reserved.
- Link information
- ID information
-
- DOI : 10.1016/S0022-3697(00)00147-5
- ISSN : 0022-3697
- Web of Science ID : WOS:000166040100058