Bound small polarons in high-T sub c superconductors

Journal Article · Fri Jun 01 04:00:00 EDT 1990 · International Journal of Modern Physics B; (USA)

DOI:https://doi.org/10.1142/S0217979290000668· OSTI ID:6358117

Szymczak, H; Genzel, L; Wittlin, A ^[1]

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1. Max-Planck-Institut fur Festorperforschung, Heisenbergstr. 1, 7000 Stuttgart 80 (DE)

The thermal and acoustic anomalies in high-T{sub c} superconductors are interpreted in terms of contributions arising from the tunneling motion of bound small polarons. The small polarons arise in YBa{sub 2}Cu{sub 3}O{sub 7} oxides due to the localization of the holes on one of the four O{sup 2{minus}} ions surrounding the Cu(2) site in the CuO{sub 2} plane. The optical absorption band located at 0.4 eV is explained as a light-induced transfer of holes between the equivalent O{sup 2{minus}} sites. It is argued that the strong hole-lattice interaction is responsible for the enhanced oscillator strength of optical phonons in YBa{sub 2}Cu{sub 3}O{sub 7}.

• OSTI ID: 6358117
• Journal Information: International Journal of Modern Physics B; (USA), Journal Name: International Journal of Modern Physics B; (USA) Vol. 4:7,8; ISSN 0217-9792; ISSN IJPBE
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
360202 -- Ceramics
Cermets
& Refractories-- Structure & Phase Studies
360204 -- Ceramics
Cermets
& Refractories-- Physical Properties
426001 -- Engineering-- Superconducting Devices & Circuits-- (1990-)
656100* -- Condensed Matter Physics-- Superconductivity
75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
ALKALINE EARTH METAL COMPOUNDS
BARIUM COMPOUNDS
BARIUM OXIDES
CHALCOGENIDES
CHEMICAL COMPOSITION
COPPER COMPOUNDS
COPPER OXIDES
ELECTRIC CONDUCTIVITY
ELECTRICAL PROPERTIES
ELECTRON-PHONON COUPLING
HIGH-TC SUPERCONDUCTORS
HOLE MOBILITY
MATHEMATICAL MODELS
MOBILITY
OPTICAL PROPERTIES
OXIDES
OXYGEN COMPOUNDS
PARTICLE MODELS
PHYSICAL PROPERTIES
POLARONS
QUASI PARTICLES
STRONG-COUPLING MODEL
SUPERCONDUCTIVITY
SUPERCONDUCTORS
THERMAL DIFFUSIVITY
THERMODYNAMIC PROPERTIES
TRANSITION ELEMENT COMPOUNDS
TUNNELING
YTTRIUM COMPOUNDS