Phonons and superconductivity in Nd[sub 2[minus][ital x]]Ce[sub [ital x]]CuO[sub 4]
Journal Article
·
· Physical Review, B: Condensed Matter; (United States)
- Cray Research Inc., 655E Lone Oak Drive, Eagan, Minnesota 55121 (United States)
- Department of Physics and Astronomy, Louisiana State University, Baton Rouge, Louisiana 70803 (United States)
We investigate superconducting properties of Nd[sub 2[minus][ital x]]Ce[sub [ital x]]CuO[sub 4] using conventional strong-coupling theory. The Eliashberg equations were solved based on a realistic model of the phonon density of states. The calculated properties are in good agreement with available experimental data. Specifically, we find the partial isotope exponents to be [alpha][sub Nd]=0.066, [alpha][sub Cu]=0.148, and [alpha][sub O]=0.035. The coupling parameter [lambda] is found to be 1.135 and 2[Delta][sub 0]/[ital k][sub [ital B]T[ital c]]=4.458. Our calculated quasiparticle density of states is also consistent with experiment. This study suggests that phonons in Nd[sub 2[minus][ital x]]Ce[sub [ital x]]CuO[sub 4] may have a role similar to that in conventional superconductors in which they mediate electron pairing.
- OSTI ID:
- 6934253
- Journal Information:
- Physical Review, B: Condensed Matter; (United States), Journal Name: Physical Review, B: Condensed Matter; (United States) Vol. 46:21; ISSN 0163-1829; ISSN PRBMDO
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
665411* -- Basic Superconductivity Studies-- (1992-)
75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
AMINES
AMMONIUM COMPOUNDS
CERIUM COMPOUNDS
CERIUM OXIDES
CHALCOGENIDES
COPPER COMPOUNDS
COPPER OXIDES
COUPLING
ELECTRIC CONDUCTIVITY
ELECTRICAL PROPERTIES
ELECTRON-PHONON COUPLING
FREQUENCY DEPENDENCE
HIGH-TC SUPERCONDUCTORS
NEODYMIUM COMPOUNDS
NEODYMIUM OXIDES
ORGANIC COMPOUNDS
OXIDES
OXYGEN COMPOUNDS
PHONONS
PHYSICAL PROPERTIES
QUASI PARTICLES
QUATERNARY COMPOUNDS
RARE EARTH COMPOUNDS
SUPERCONDUCTIVITY
SUPERCONDUCTORS
TRANSITION ELEMENT COMPOUNDS
75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
AMINES
AMMONIUM COMPOUNDS
CERIUM COMPOUNDS
CERIUM OXIDES
CHALCOGENIDES
COPPER COMPOUNDS
COPPER OXIDES
COUPLING
ELECTRIC CONDUCTIVITY
ELECTRICAL PROPERTIES
ELECTRON-PHONON COUPLING
FREQUENCY DEPENDENCE
HIGH-TC SUPERCONDUCTORS
NEODYMIUM COMPOUNDS
NEODYMIUM OXIDES
ORGANIC COMPOUNDS
OXIDES
OXYGEN COMPOUNDS
PHONONS
PHYSICAL PROPERTIES
QUASI PARTICLES
QUATERNARY COMPOUNDS
RARE EARTH COMPOUNDS
SUPERCONDUCTIVITY
SUPERCONDUCTORS
TRANSITION ELEMENT COMPOUNDS