Superconducting gap in Pr[sub x]Y[sub 1[minus]x]Ba[sub 2]Cu[sub 4]O[sub 8] and YBa[sub 2[minus]y]Sr[sub y]Cu[sub 4]O[sub 8] probed by infrared phonon self-energies
Conference
·
· Journal of Superconductivity; (United States)
OSTI ID:7020689
- Chalmers Univ. of Technology, Goeteborg (Sweden)
- Chalmers Univ. of Technology, Goeteborg (Sweden) Univ. of Goeteborg (Sweden)
- Max-Planck-Institut fuer Festkoerperforschung, Stuttgart (Germany)
We report a reflectivity study of the z-polarized TO-phonons of Pr[sub x]Y[sub 1[minus]x]Ba[sub 2]Cu[sub 4]O[sub 8] and YBa[sub 2[minus]y]Sr[sub y]Cu[sub 4]O[sub 8] alloys in the temperature range 10-300 K. Anomalies of the frequency and linewidth of the plane-oxygen vibration at [omega] [approximately] 300 cm[sup [minus]1] due to the opening of the superconducting gap are found to occur upon crossing the superconducting transition temperature Tc. Phonon self-energy effects are strongly dependent on Tc, providing evidence for a relative shift of the gap with respect to the energy of phonon. 30 refs., 2 figs.
- OSTI ID:
- 7020689
- Report Number(s):
- CONF-930710--
- Conference Information:
- Journal Name: Journal of Superconductivity; (United States) Journal Volume: 7:1
- Country of Publication:
- United States
- Language:
- English
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·
OSTI ID:6815595
Phonon Raman scattering in Y{sub 1{minus}{ital x}}Pr{sub {ital x}}Ba{sub 2}Cu{sub 4}O{sub 8} ({ital x}=0{endash}1) and (Y{sub 1{minus}{ital x}}Pr{sub {ital x}}){sub 2}Ba{sub 4}Cu{sub 7}O{sub 15{minus}{delta}} ({ital x}=0{endash}0.6)
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OSTI ID:6220076
Related Subjects
36 MATERIALS SCIENCE
360204 -- Ceramics
Cermets
& Refractories-- Physical Properties
360207* -- Ceramics
Cermets
& Refractories-- Superconducting Properties-- (1992-)
ALKALINE EARTH METAL COMPOUNDS
BARIUM COMPOUNDS
CERAMICS
CHALCOGENIDES
COPPER COMPOUNDS
CUPRATES
ELECTRIC CONDUCTIVITY
ELECTRICAL PROPERTIES
ELECTROMAGNETIC RADIATION
FAR INFRARED RADIATION
HIGH-TC SUPERCONDUCTORS
IMPURITIES
INFRARED RADIATION
INTERFEROMETRY
OXIDES
OXYGEN COMPOUNDS
PHONONS
PHYSICAL PROPERTIES
PRASEODYMIUM COMPOUNDS
QUASI PARTICLES
RADIATIONS
RARE EARTH COMPOUNDS
SPECTRA
STRONTIUM COMPOUNDS
SUPERCONDUCTIVITY
SUPERCONDUCTORS
THERMODYNAMIC PROPERTIES
TRANSITION ELEMENT COMPOUNDS
TRANSITION TEMPERATURE
YTTRIUM COMPOUNDS
360204 -- Ceramics
Cermets
& Refractories-- Physical Properties
360207* -- Ceramics
Cermets
& Refractories-- Superconducting Properties-- (1992-)
ALKALINE EARTH METAL COMPOUNDS
BARIUM COMPOUNDS
CERAMICS
CHALCOGENIDES
COPPER COMPOUNDS
CUPRATES
ELECTRIC CONDUCTIVITY
ELECTRICAL PROPERTIES
ELECTROMAGNETIC RADIATION
FAR INFRARED RADIATION
HIGH-TC SUPERCONDUCTORS
IMPURITIES
INFRARED RADIATION
INTERFEROMETRY
OXIDES
OXYGEN COMPOUNDS
PHONONS
PHYSICAL PROPERTIES
PRASEODYMIUM COMPOUNDS
QUASI PARTICLES
RADIATIONS
RARE EARTH COMPOUNDS
SPECTRA
STRONTIUM COMPOUNDS
SUPERCONDUCTIVITY
SUPERCONDUCTORS
THERMODYNAMIC PROPERTIES
TRANSITION ELEMENT COMPOUNDS
TRANSITION TEMPERATURE
YTTRIUM COMPOUNDS