Thermopower of high-[ital T][sub [ital c]] materials and electron-phonon-impurity interference

Journal Article · Sun Oct 31 23:00:00 EST 1993 · Physical Review, B: Condensed Matter; (United States)

DOI:https://doi.org/10.1103/PhysRevB.48.13137· OSTI ID:6129240

Livanov, D V ^[1]; Sergeev, A V ^[2]

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1. Moscow Steel and Alloys Institute, Leninskiy Prospect 4, 117936 Moscow (Russian Federation)
2. Moscow State Pedagogical University, M. Pirogovskaya str.1, 119435 Moscow (Russian Federation)

We show that the thermopower of alloys with nonisovalent substitution is described by renormalization due to electron-phonon-impurity interference. The thermopower of high-[ital T][sub [ital c]] oxides as well as ordinary metallic alloys is analyzed. For Bi- and Tl-based oxides the observed temperature dependence with a maximum at 100--150 K and subsequent decrease with a sign change results from hole scattering on excess O[sup 2[minus]] ions. The more complicated situation in Y-Ba-Cu-O is also discussed to explain the strong concentration dependence and different signs of the thermopower along the [ital a] and [ital b] axes. The electron-phonon coupling constant evaluated from experimental data has a reasonable value: 1--2.5.

• OSTI ID: 6129240
• Journal Information: Physical Review, B: Condensed Matter; (United States), Journal Name: Physical Review, B: Condensed Matter; (United States) Vol. 48:17; ISSN 0163-1829; ISSN PRBMDO
• Country of Publication: United States
• Language: English

Related Subjects

665411* -- Basic Superconductivity Studies-- (1992-)
75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
COUPLING
ELECTRICAL PROPERTIES
ELECTRON-PHONON COUPLING
HIGH-TC SUPERCONDUCTORS
IMPURITIES
INTERFERENCE
PHYSICAL PROPERTIES
RENORMALIZATION
SUPERCONDUCTORS
THERMOELECTRIC PROPERTIES