Softening of Cu-O vibrational modes as a precursor to onset of superconductivity in EuBa/sub 2/Cu/sub 3/O/sub 7/. sqrt. /sub delta/
Journal Article
·
· Phys. Rev. B: Condens. Matter; (United States)
T-dependent /sup 119/Sn Mossbauer Debye-Waller factor f(T) in EuBa/sub 2/Cu/sub 2.98/Sn/sub 0.02/O/sub 7/..sqrt../sub delta/ displays evidence of a substantial softening in lattice vibrations at Tless than or equal to110 K. In a previous /sup 151/Eu study, no detectable softening in f(T) was found at the rare-earth site. These results taken together show that Sn atoms as a dilute impurity replace predominantly Cu(1) sites in the Cu-O chains of the orthorhombic structure. It appears that a softening in vibrational modes localized onto the Cu-O linear chains occurs as a precursor to the onset of superconductivity. These results show that phonons do appear to play an important role in electron pairing in these high-T/sub c/ oxide superconductors
- Research Organization:
- Department of Electrical and Computer Engineering and Department of Physics, University of Cincinnati, Cincinnati, Ohio 45221
- OSTI ID:
- 5356985
- Journal Information:
- Phys. Rev. B: Condens. Matter; (United States), Journal Name: Phys. Rev. B: Condens. Matter; (United States) Vol. 37:7; ISSN PRBMD
- Country of Publication:
- United States
- Language:
- English
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Journal Article
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Sat Dec 31 23:00:00 EST 1988
· Phys. Rev. B: Condens. Matter; (United States)
·
OSTI ID:6441501
Moessbauer study of the lattice dynamics in /sup 119/Sn-doped superconducting and nonsuperconducting YBa/sub 2/Cu/sub 3/O/sub 7/. sqrt. /sub delta/
Journal Article
·
Mon Feb 29 23:00:00 EST 1988
· Phys. Rev. B: Condens. Matter; (United States)
·
OSTI ID:5288529
Mossbauer study of the lattice properties of the system V/sub 3/Ga/sub 1//sub -//sub x/Sn/sub x/
Journal Article
·
Fri Oct 01 00:00:00 EDT 1976
· Phys. Rev., B; (United States)
·
OSTI ID:7337903
Related Subjects
36 MATERIALS SCIENCE
360204* -- Ceramics
Cermets
& Refractories-- Physical Properties
656100 -- Condensed Matter Physics-- Superconductivity
75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
ALKALINE EARTH METAL COMPOUNDS
ALLOYS
BARIUM COMPOUNDS
BARIUM OXIDES
CHALCOGENIDES
COPPER COMPOUNDS
COPPER OXIDES
DAYS LIVING RADIOISOTOPES
DEBYE-WALLER FACTOR
EUROPIUM COMPOUNDS
EUROPIUM OXIDES
EVEN-ODD NUCLEI
INTERMEDIATE MASS NUCLEI
INTERNAL CONVERSION RADIOISOTOPES
ISOMERIC TRANSITION ISOTOPES
ISOTOPES
LATTICE VIBRATIONS
LOW TEMPERATURE
MOESSBAUER EFFECT
NUCLEI
OXIDES
OXYGEN COMPOUNDS
PHONONS
QUASI PARTICLES
RADIOISOTOPES
RARE EARTH COMPOUNDS
STABLE ISOTOPES
SUPERCONDUCTORS
TEMPERATURE DEPENDENCE
TIN 119
TIN ADDITIONS
TIN ALLOYS
TIN ISOTOPES
TRANSITION ELEMENT COMPOUNDS
360204* -- Ceramics
Cermets
& Refractories-- Physical Properties
656100 -- Condensed Matter Physics-- Superconductivity
75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
ALKALINE EARTH METAL COMPOUNDS
ALLOYS
BARIUM COMPOUNDS
BARIUM OXIDES
CHALCOGENIDES
COPPER COMPOUNDS
COPPER OXIDES
DAYS LIVING RADIOISOTOPES
DEBYE-WALLER FACTOR
EUROPIUM COMPOUNDS
EUROPIUM OXIDES
EVEN-ODD NUCLEI
INTERMEDIATE MASS NUCLEI
INTERNAL CONVERSION RADIOISOTOPES
ISOMERIC TRANSITION ISOTOPES
ISOTOPES
LATTICE VIBRATIONS
LOW TEMPERATURE
MOESSBAUER EFFECT
NUCLEI
OXIDES
OXYGEN COMPOUNDS
PHONONS
QUASI PARTICLES
RADIOISOTOPES
RARE EARTH COMPOUNDS
STABLE ISOTOPES
SUPERCONDUCTORS
TEMPERATURE DEPENDENCE
TIN 119
TIN ADDITIONS
TIN ALLOYS
TIN ISOTOPES
TRANSITION ELEMENT COMPOUNDS