Locus of pairing interaction in YBa[sub 2]Cu[sub 3]O[sub 7] by site-selective oxygen isotope shift: [sup 18]O in CuO[sub 2] plane layers
- Morris Research, 1918 University Avenue, Berkeley, California 94704 (United States) Department of Material Science and Engineering, University of California, Berkeley, California 94720 (United States) Center for Advanced Materials, Lawrence Berkeley Laboratory, Berkeley, California 94720 (United States)
The oxygen isotope shift of [ital T][sub [ital c]] in YBa[sub 2]Cu[sub 3]O[sub 7] has been measured for samples containing [similar to]95% [sup 18]O in the CuO[sub 2] plane [O2,O3] sites and primarily [sup 16]O in the apical [O4] and chian [O1] sites. The [ital T][sub [ital c]] of the site-selectively substituted samples is [ital higher] than that of the [sup 16]O control samples by 0.10--0.14 K, in contrast to the [ital decrease] in [ital T][sub [ital c]] of 0.20--0.23 K for complete [sup 18]O substitution at all sites. Our results inicate that the phonon-mediated contribution to the pairing mechanism in YBa[sub 2]Cu[sub 3]O[sub 7] involves the apical [O4] sites, and not just the CuO[sub 2] plane [O2,O3] sites.
- DOE Contract Number:
- AC03-76SF00098
- OSTI ID:
- 6906147
- Journal Information:
- Physical Review Letters; (United States), Journal Name: Physical Review Letters; (United States) Vol. 70:1; ISSN 0031-9007; ISSN PRLTAO
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
360207* -- Ceramics
Cermets
& Refractories-- Superconducting Properties-- (1992-)
ALKALINE EARTH METAL COMPOUNDS
BARIUM COMPOUNDS
BARIUM OXIDES
CHALCOGENIDES
COPPER COMPOUNDS
COPPER OXIDES
COUPLING
DIAMAGNETISM
ELECTRON-PHONON COUPLING
EVEN-EVEN NUCLEI
HIGH-TC SUPERCONDUCTORS
INTERACTIONS
ISOTOPE EFFECTS
ISOTOPES
LASER SPECTROSCOPY
LIGHT NUCLEI
MAGNETISM
NUCLEI
OXIDES
OXYGEN 18
OXYGEN COMPOUNDS
OXYGEN ISOTOPES
PAIRING INTERACTIONS
PHYSICAL PROPERTIES
RAMAN SPECTROSCOPY
SPECTROSCOPY
STABLE ISOTOPES
SUPERCONDUCTORS
THERMODYNAMIC PROPERTIES
TRANSITION ELEMENT COMPOUNDS
TRANSITION TEMPERATURE
YTTRIUM COMPOUNDS
YTTRIUM OXIDES