Absence of anomalous copper vibrations in YBa[sub 2]Cu[sub 3]O[sub 7[minus][delta]]
Journal Article
·
· Physical Review, B: Condensed Matter; (United States)
- Department of Physics, Harvard University, Cambridge, Massachusetts 02138 (United States)
- Solid State Division, Oak Ridge National Laboratory, P.O. Box 2008, Oak Ridge, Tennessee 37831-6393 (United States)
- Engineering Physics and Mathematics, Oak Ridge National Laboratory, P.O. Box 2008, Oak Ridge, Tennessee 7831-6356 (United States)
We find a normal temperature dependence for the Doppler broadening of the 230-eV resonance in the neutron cross section of [sup 65]Cu atoms in YBa[sub 2]Cu[sub 3]O[sub 7] between 10 and 300 K. No abrupt changes in the copper momentum spectrum corresponding to vibrations in the [ital ab] plane were observed in either the superconducting YBa[sub 2]Cu[sub 3]O[sub 7] or nonsuperconducting YBa[sub 2]Cu[sub 3]O[sub 6.2] compounds. This result differs from ion-channeling experiments in which sharp changes in the channeling minimum yield and width of the rocking curve indicated irregular vibrational behavior near the superconducting critical temperature.
- DOE Contract Number:
- AC05-84OR21400
- OSTI ID:
- 7180263
- Journal Information:
- Physical Review, B: Condensed Matter; (United States), Journal Name: Physical Review, B: Condensed Matter; (United States) Vol. 50:21; ISSN PRBMDO; ISSN 0163-1829
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
36 MATERIALS SCIENCE
360606* -- Other Materials-- Physical Properties-- (1992-)
665411 -- Basic Superconductivity Studies-- (1992-)
75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
ALKALINE EARTH METAL COMPOUNDS
BARIUM COMPOUNDS
BARIUM OXIDES
CHALCOGENIDES
COPPER COMPOUNDS
COPPER OXIDES
DOPPLER BROADENING
HIGH-TC SUPERCONDUCTORS
LATTICE VIBRATIONS
LINE BROADENING
NEUTRON SPECTRA
OXIDES
OXYGEN COMPOUNDS
PHONONS
QUASI PARTICLES
SPECTRA
SUPERCONDUCTORS
TEMPERATURE RANGE
TEMPERATURE RANGE 0013-0065 K
TEMPERATURE RANGE 0065-0273 K
TRANSITION ELEMENT COMPOUNDS
YTTRIUM COMPOUNDS
YTTRIUM OXIDES
360606* -- Other Materials-- Physical Properties-- (1992-)
665411 -- Basic Superconductivity Studies-- (1992-)
75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
ALKALINE EARTH METAL COMPOUNDS
BARIUM COMPOUNDS
BARIUM OXIDES
CHALCOGENIDES
COPPER COMPOUNDS
COPPER OXIDES
DOPPLER BROADENING
HIGH-TC SUPERCONDUCTORS
LATTICE VIBRATIONS
LINE BROADENING
NEUTRON SPECTRA
OXIDES
OXYGEN COMPOUNDS
PHONONS
QUASI PARTICLES
SPECTRA
SUPERCONDUCTORS
TEMPERATURE RANGE
TEMPERATURE RANGE 0013-0065 K
TEMPERATURE RANGE 0065-0273 K
TRANSITION ELEMENT COMPOUNDS
YTTRIUM COMPOUNDS
YTTRIUM OXIDES