Calculation of the isotope effect in La/sub 2-//sub x/M/sub x/CuO/sub 4/ and YBa/sub 2/Cu/sub 3/O/sub 7-//sub x/
Journal Article
·
· Phys. Rev. B: Condens. Matter; (United States)
We have calculated the transition temperature and the isotope shift for oxygen replacement for La/sub 2-//sub x/M/sub x/CuO/sub 4/ and YBa/sub 2/Cu/sub 3/O/sub 7-//sub x/, based on the lattice-dynamical calculations of these compounds with shell models. It is found that the exeprimental value of T/sub c/ and the isotope shift ..delta..T/sub c/ for La/sub 2-//sub x/M/sub x/CuO/sub 4/ can be accounted for on the basis of McMillan's strong-coupling equation for T/sub c/, supporting the conclusion that La/sub 2-//sub x/M/sub x/CuO/sub 4/ is a strong-coupling BCS superconductor. In contrast, experimental values of T/sub c/ for YBa/sub 2/Cu/sub 3/O/sub 7-//sub x/ cannot be obtained on this basis. It is argued that expression isotope shifts in terms of isotopic mass exponents ..cap alpha../sub i/ is not a useful procedure for these multi-ionic compounds.
- Research Organization:
- Physics Department, University of Texas, Austin, Texas 78712
- OSTI ID:
- 6781733
- Journal Information:
- Phys. Rev. B: Condens. Matter; (United States), Journal Name: Phys. Rev. B: Condens. Matter; (United States) Vol. 38:10; ISSN PRBMD
- Country of Publication:
- United States
- Language:
- English
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Wed Jan 24 23:00:00 EST 1990
· AIP Conference Proceedings (American Institute of Physics); (USA)
·
OSTI ID:6793823
Possibility of an increase in density of states to explain the T/sub c/ change from La/sub 2-//sub x/Sr/sub x/CuO/sub 4/ to YBa/sub 2/Cu/sub 3/O/sub 7/
Journal Article
·
Fri Jul 01 00:00:00 EDT 1988
· Phys. Rev. B: Condens. Matter; (United States)
·
OSTI ID:6952493
Bolometric photoresponse of superconducting YBa{sub 2}Cu{sub 3}O{sub 7{minus}x}/La{sub 2}CuO{sub 4} multilayers to infrared radiation
Book
·
Fri Dec 30 23:00:00 EST 1994
·
OSTI ID:86175
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
BARIUM COMPOUNDS
BARIUM OXIDES
CHALCOGENIDES
COOPER PAIRS
COPPER COMPOUNDS
COPPER OXIDES
EUROPIUM COMPOUNDS
EUROPIUM OXIDES
ISOTOPE EFFECTS
LANTHANUM COMPOUNDS
LANTHANUM OXIDES
LATTICE VIBRATIONS
OXIDES
OXYGEN COMPOUNDS
PHYSICAL PROPERTIES
RARE EARTH COMPOUNDS
SPECTRAL SHIFT
STRONTIUM COMPOUNDS
STRONTIUM OXIDES
THERMODYNAMIC PROPERTIES
TRANSITION ELEMENT COMPOUNDS
TRANSITION TEMPERATURE
YTTRIUM COMPOUNDS
YTTRIUM OXIDES
360204* -- Ceramics
Cermets
& Refractories-- Physical Properties
656100 -- Condensed Matter Physics-- Superconductivity
75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
ALKALINE EARTH METAL COMPOUNDS
BARIUM COMPOUNDS
BARIUM OXIDES
CHALCOGENIDES
COOPER PAIRS
COPPER COMPOUNDS
COPPER OXIDES
EUROPIUM COMPOUNDS
EUROPIUM OXIDES
ISOTOPE EFFECTS
LANTHANUM COMPOUNDS
LANTHANUM OXIDES
LATTICE VIBRATIONS
OXIDES
OXYGEN COMPOUNDS
PHYSICAL PROPERTIES
RARE EARTH COMPOUNDS
SPECTRAL SHIFT
STRONTIUM COMPOUNDS
STRONTIUM OXIDES
THERMODYNAMIC PROPERTIES
TRANSITION ELEMENT COMPOUNDS
TRANSITION TEMPERATURE
YTTRIUM COMPOUNDS
YTTRIUM OXIDES