Temperature-dependent phonon lifetime of the 428-cm/sup /minus/1/ Raman line in La/sub 2/CuO/sub 4+/ital y//
Journal Article
·
· Phys. Rev. B: Condens. Matter; (United States)
Raman measurements of the 428-cm/sup /minus/1/ /ital A//sub 1/ital g// oxygen vibrational mode in single-crystal La/sub 2/CuO/sub 4+/ital y// show that the linewidth of this dominant line increases by a factor of 2 from 8 to 300 K, while its line position varies by less than 1 cm/sup /minus/1/ over this temperature range. The variation with temperature of the linewidth of the zone-center optical phonon of frequency /omega//sub 0/ is well explained by a three-phonon scattering process involving a decay to two phonons with wave vectors /bold k/ and /minus//bold k/ and frequencies near /omega//sub 0//2. No changes in either the linewidth or the line position was observed upon application of a magnetic field (H/parallel//cflx z/) up to 11 T.
- Research Organization:
- Center for Materials Science and Engineering and Department of Physics, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139 (US); Francis Bitter National Magnet Laboratory, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139; Center for Materials Science and Engineering and Department of Electrical Engineering and Department of Physics, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139
- OSTI ID:
- 6051273
- Journal Information:
- Phys. Rev. B: Condens. Matter; (United States), Journal Name: Phys. Rev. B: Condens. Matter; (United States) Vol. 40:4; ISSN PRBMD
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
36 MATERIALS SCIENCE
360204* -- Ceramics
Cermets
& Refractories-- Physical Properties
COPPER COMPOUNDS
CRYSTALS
CUPRATES
ELEMENTS
ENERGY LEVELS
EXCITED STATES
LANTHANUM COMPOUNDS
LINE WIDTHS
LOW TEMPERATURE
MAGNETIC FIELDS
MEDIUM TEMPERATURE
MONOCRYSTALS
NONMETALS
OXYGEN
OXYGEN COMPOUNDS
PHONONS
QUASI PARTICLES
RAMAN SPECTRA
RARE EARTH COMPOUNDS
SPECTRA
TEMPERATURE DEPENDENCE
TRANSITION ELEMENT COMPOUNDS
ULTRALOW TEMPERATURE
VERY LOW TEMPERATURE
VIBRATIONAL STATES
360204* -- Ceramics
Cermets
& Refractories-- Physical Properties
COPPER COMPOUNDS
CRYSTALS
CUPRATES
ELEMENTS
ENERGY LEVELS
EXCITED STATES
LANTHANUM COMPOUNDS
LINE WIDTHS
LOW TEMPERATURE
MAGNETIC FIELDS
MEDIUM TEMPERATURE
MONOCRYSTALS
NONMETALS
OXYGEN
OXYGEN COMPOUNDS
PHONONS
QUASI PARTICLES
RAMAN SPECTRA
RARE EARTH COMPOUNDS
SPECTRA
TEMPERATURE DEPENDENCE
TRANSITION ELEMENT COMPOUNDS
ULTRALOW TEMPERATURE
VERY LOW TEMPERATURE
VIBRATIONAL STATES