Spectroscopy of the layered high-temperature superconductors and their collective plasmon modes: a model for phonon- and plasmon-induced pairing
The recently discovered layered copper oxide high-T/sub c/ superconductors are discussed as models of a layered electron gas with highly anisotropic collective modes (layer plasmons). Our view that a combined phonon--plasmon pairing interaction is the mechanism for the high transition temperatures is presented together with the appropriate dielectric function describing the electron collective response. The implications of this model for the interpretation of optical (infrared and optical absorption, reflectivity, and Raman scattering) and related spectroscopies, such as electron and positron loss, are given. In particular, temperature-dependent loss features are shown to arise from the lowest branch of the layer plasmons.
- Research Organization:
- Lawrence Berkeley Laboratory, University of California, Berkeley, California 94720
- OSTI ID:
- 6418986
- Journal Information:
- J. Opt. Soc. Am. B: Opt. Phys.; (United States), Vol. 6:3
- Country of Publication:
- United States
- Language:
- English
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75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
BARIUM OXIDES
COLLECTIVE EXCITATIONS
OPTICAL PROPERTIES
COPPER OXIDES
TYPE-II SUPERCONDUCTORS
YTTRIUM OXIDES
CERAMICS
DISPERSION RELATIONS
ELECTRON LOSS
INFRARED SPECTRA
PLASMONS
RAMAN SPECTRA
SUPERCONDUCTIVITY
ALKALINE EARTH METAL COMPOUNDS
BARIUM COMPOUNDS
CHALCOGENIDES
COPPER COMPOUNDS
ELECTRIC CONDUCTIVITY
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ENERGY-LEVEL TRANSITIONS
EXCITATION
OXIDES
OXYGEN COMPOUNDS
PHYSICAL PROPERTIES
QUASI PARTICLES
SPECTRA
SUPERCONDUCTORS
TRANSITION ELEMENT COMPOUNDS
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