Thermoelectric power of the thallium-based superconductor Tl[sub 2]Ba[sub 2]Ca[sub 2]Cu[sub 3]O[sub 10[minus][delta]]
- Department of Physics and Astronomy, University of Kansas, Lawrence, Kansas 66045 (United States)
- Department of Physics, University of Arkansas, Fayetteville, Arkansas 72701 (United States)
The temperature dependence of the thermoelectric power of the high-temperature superconductor Tl[sub 2]Ba[sub 2]Ca[sub 2]Cu[sub 3]O[sub 10[minus][delta]] is reported. The contribution of holes from the valence band satisfying a Fermi-liquid model gives the major part of the measured thermoelectric power. The results show that the conduction-band electrons also contribute to the total output of the thermoelectric power and the portion of the electron's contribution increases with temperature. An explicit expression for the thermolectric power of the 2:2:2:3 phase was derived based on a two-band model and the experimental data, which is given as [ital S]([mu][ital V])=0.121[ital T][minus](280[minus]0.2[ital T])[ital e][sup [minus]550/[ital T]]. A general formula, [ital S]=[ital AT]+([ital B][lambda]+[ital CT])exp([minus][lambda]/[ital T]), is found to give a close description of the thermoelectric power of various cuprate high-[ital T][sub [ital c]] superconductors.
- OSTI ID:
- 5429958
- Journal Information:
- Physical Review, B: Condensed Matter; (United States), Journal Name: Physical Review, B: Condensed Matter; (United States) Vol. 48:1; ISSN PRBMDO; ISSN 0163-1829
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
360207* -- Ceramics
Cermets
& Refractories-- Superconducting Properties-- (1992-)
ALKALINE EARTH METAL COMPOUNDS
BAND THEORY
BARIUM COMPOUNDS
BARIUM OXIDES
CALCIUM COMPOUNDS
CALCIUM OXIDES
CHALCOGENIDES
COPPER COMPOUNDS
CUPRATES
ELECTRICITY
HIGH-TC SUPERCONDUCTORS
OXIDES
OXYGEN COMPOUNDS
SUPERCONDUCTORS
TEMPERATURE DEPENDENCE
TEMPERATURE RANGE
TEMPERATURE RANGE 0065-0273 K
TEMPERATURE RANGE 0273-0400 K
THALLIUM COMPOUNDS
THALLIUM OXIDES
THERMOELECTRICITY
TRANSITION ELEMENT COMPOUNDS
TRANSPORT THEORY