Oxygen isotope effect in high-temperature oxide superconductors
Journal Article
·
· Science (Washington, D.C.); (USA)
The effect of oxygen isotope substitution on the superconducting transition temperature, T{sub c}, has been measured for BaBi{sub 0.25}Pb{sub 0.75}O{sub 3} (T{sub c} {approx} 11 K) and La{sub 1.85} Ca{sub 0.15}CuO{sub 4} (T{sub c} {approx} 20 K), and is compared to the shifts observed for La{sub 1.85}Sr{sub 0.15}CuO{sub 4} (T{sub c} {approx} 37 K) and YBa{sub 2}Cu{sub 3}O{sub 7} (T{sub c} {approx} 92 K). For all four materials, the transition temperature is shifted lower temperature upon substitution of oxygen-18 for oxygen-16. The observed shifts demonstrate that phonons are involved in the electron-pairing mechanism in these oxide superconductors.
- OSTI ID:
- 5251754
- Journal Information:
- Science (Washington, D.C.); (USA), Journal Name: Science (Washington, D.C.); (USA) Vol. 238; ISSN SCIEA; ISSN 0036-8075
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
36 MATERIALS SCIENCE
360000* -- Materials
360202 -- Ceramics
Cermets
& Refractories-- Structure & Phase Studies
37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
400202 -- Isotope Effects
Isotope Exchange
& Isotope Separation
ALKALINE EARTH METALS
BARIUM
BISMUTH
COPPER
DATA
DATA ANALYSIS
ELEMENTS
EXPERIMENTAL DATA
HIGH TEMPERATURE
INFORMATION
ISOTOPES
LANTHANUM
LEAD
MEASURING INSTRUMENTS
MEASURING METHODS
METALS
NUMERICAL DATA
OXYGEN ISOTOPES
PHONONS
QUASI PARTICLES
RARE EARTHS
STRONTIUM
SUPERCONDUCTORS
TRANSITION ELEMENTS
YTTRIUM
360000* -- Materials
360202 -- Ceramics
Cermets
& Refractories-- Structure & Phase Studies
37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
400202 -- Isotope Effects
Isotope Exchange
& Isotope Separation
ALKALINE EARTH METALS
BARIUM
BISMUTH
COPPER
DATA
DATA ANALYSIS
ELEMENTS
EXPERIMENTAL DATA
HIGH TEMPERATURE
INFORMATION
ISOTOPES
LANTHANUM
LEAD
MEASURING INSTRUMENTS
MEASURING METHODS
METALS
NUMERICAL DATA
OXYGEN ISOTOPES
PHONONS
QUASI PARTICLES
RARE EARTHS
STRONTIUM
SUPERCONDUCTORS
TRANSITION ELEMENTS
YTTRIUM