Inelastic-neutron-scattering study of the electron-phonon interaction in a superconducting La sub 1. 85 Sr sub 0. 15 CuO sub 4 single crystal
- Physics Department, Brookhaven National Laboratory, Upton, NY (USA)
- Yamanashi University, Miyamae 7, Kofu 400 (Japan)
Linewidths of some transverse acoustic phonons have been studied as a function of temperature on a superconducting single-crystal sample of La{sub 1.85}Sr{sub 0.15}CuO{sub 4} ({ital T}{sub {ital c}}=33 K) with the goal of measuring the electron-phonon interaction. The phonons studied have energies in the range {omega}{approximately}6.0--9.5 meV and observed full widths at half-maximum in the range 2{gamma}{sub obs}{approximately}0.25--0.5 meV. No temperature-dependent changes were observed in any of the linewidths near the transition temperature. This null result is consistent with a low electronic density of states at the Fermi surface, and an electron-phonon coupling parameter {lambda} that is not unusually high compared with conventional superconductors.
- DOE Contract Number:
- AC02-76CH00016
- OSTI ID:
- 6339001
- Journal Information:
- Physical Review, B: Condensed Matter; (USA), Vol. 42:7; ISSN 0163-1829
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
COPPER OXIDES
ELECTRON-PHONON COUPLING
LANTHANUM OXIDES
STRONTIUM OXIDES
ENERGY-LEVEL DENSITY
FERMI LEVEL
HIGH-TC SUPERCONDUCTORS
LINE WIDTHS
MONOCRYSTALS
NEUTRON DIFFRACTION
TEMPERATURE DEPENDENCE
ALKALINE EARTH METAL COMPOUNDS
CHALCOGENIDES
COHERENT SCATTERING
COPPER COMPOUNDS
CRYSTALS
DIFFRACTION
ENERGY LEVELS
LANTHANUM COMPOUNDS
OXIDES
OXYGEN COMPOUNDS
RARE EARTH COMPOUNDS
SCATTERING
STRONTIUM COMPOUNDS
SUPERCONDUCTORS
TRANSITION ELEMENT COMPOUNDS
360204* - Ceramics
Cermets
& Refractories- Physical Properties