Multiband superconductivity. A mapping to the extended attractive Hubbard model

Conference · Wed Jun 01 04:00:00 EDT 1994 · Journal of Superconductivity; (United States)

OSTI ID:7103650

Kuroki, Kazuhiko; Aoki, Hideo ^[1]

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1. Univ. of Tokyo (Japan)

Following our recent work which shows that purely repulsive multiband systems effectively reduce to the extended attractive Hubbard model having the on-site repulsion along with nearest-neighbor ([similar to]V) and next-nearest-neighbor ([similar to]W) attraction for the cuprate structures, we study the latter model in the mean-field theory. Tc against band filing for various symmetries of pairing is numerically calculated. The results show that, for the region of [similar to]V and [similar to]W expected for the mapping from the original multiband model, Tc has maximum values of the order of 100 K, which is consistent with the experimental results. For certain values of parameters, s-and d[sub x][sup 2]-y[sup 2]-wave pairing have similar values of Tc, which may suggest the possibility of a mixed phase of the two. 9 refs., 2 figs.

• OSTI ID: 7103650
• Report Number(s): CONF-930710--
• Conference Information: Journal Name: Journal of Superconductivity; (United States) Journal Volume: 7:3
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
360204 -- Ceramics
Cermets
& Refractories-- Physical Properties
360207* -- Ceramics
Cermets
& Refractories-- Superconducting Properties-- (1992-)
99 GENERAL AND MISCELLANEOUS
990200 -- Mathematics & Computers
BAND THEORY
COPPER COMPOUNDS
CRYSTAL MODELS
CUPRATES
ELECTRIC CONDUCTIVITY
ELECTRICAL PROPERTIES
HAMILTONIANS
HIGH-TC SUPERCONDUCTORS
HUBBARD MODEL
MAPPING
MATHEMATICAL MODELS
MATHEMATICAL OPERATORS
MEAN-FIELD THEORY
OXYGEN COMPOUNDS
PHYSICAL PROPERTIES
QUANTUM OPERATORS
SUPERCONDUCTIVITY
SUPERCONDUCTORS
THERMODYNAMIC PROPERTIES
TRANSITION ELEMENT COMPOUNDS
TRANSITION TEMPERATURE