Optical excitation of polaronic impurities in La[sub 2]CuO[sub 4+[ital y]]

Journal Article · Sun Aug 01 04:00:00 EDT 1993 · Physical Review, B: Condensed Matter; (United States)

DOI:https://doi.org/10.1103/PhysRevB.48.4043· OSTI ID:5528628

Falck, J P; Levy, A; Kastner, M A; Birgeneau, R J ^[1]

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1. Department of Physics, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139 (United States)

The temperature dependence of the infrared reflectivity of lightly oxygen-doped La[sub 2]CuO[sub 4+[ital y]] shows that spectral weight is transferred between free-carrier conductivity and a photoionization band of impurity-bound carriers. The large difference between the optical 0.13-eV and thermal 0.035-eV ionization energy indicates that the impurity states are stabilized by a lattice distortion. It is shown that the line shape as well as the temperature dependence is consistent with absorption from a polaronic impurity state.

• OSTI ID: 5528628
• Journal Information: Physical Review, B: Condensed Matter; (United States), Journal Name: Physical Review, B: Condensed Matter; (United States) Vol. 48:6; ISSN PRBMDO; ISSN 0163-1829
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
360207* -- Ceramics
Cermets
& Refractories-- Superconducting Properties-- (1992-)
ABSORPTION SPECTRA
CARRIER MOBILITY
CHALCOGENIDES
COPPER COMPOUNDS
CUPRATES
ELECTRIC CONDUCTIVITY
ELECTRICAL EQUIPMENT
ELECTRICAL INSULATORS
ELECTRICAL PROPERTIES
EQUIPMENT
HIGH-TC SUPERCONDUCTORS
HOLES
IMPURITIES
INFRARED SPECTRA
LANTHANUM COMPOUNDS
LANTHANUM OXIDES
MOBILITY
OSCILLATOR STRENGTHS
OXIDES
OXYGEN ADDITIONS
OXYGEN COMPOUNDS
PHYSICAL PROPERTIES
POLARONS
QUASI PARTICLES
RARE EARTH COMPOUNDS
SPECTRA
SUPERCONDUCTORS
TEMPERATURE DEPENDENCE
TRANSITION ELEMENT COMPOUNDS