Magnetic dynamics of superconducting La sub 1. 86 Sr sub 0. 14 CuO sub 4 (US)
- AT T Bell Laboratories, Murray Hill, New Jersey 07974 (United States) Riso National Laboratory, Roskilde, DK-4000, Denmark Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831 (United States)
The general magnetic response function {chi}({ital Q},{omega}) of a superconducting ({ital T}{sub {ital c}}=33 K) single crystal of La{sub 1.86}Sr{sub 0.14}CuO{sub 4} is measured using inelastic neutron scattering. There is no gap in the magnetic fluctuation spectrum of the normal state. Superconductivity reduces {chi}{prime}{prime}({ital Q},{omega}) in progressively greater proportion as {h bar}{omega} decreases below 6 meV. The superconducting transition coincides with a sharp maximum in the temperature-dependent {chi}{prime}{prime}({ital Q},{omega}) for {h bar}{omega}=4 meV and {ital Q} fixed at the incommensurate wave vector characterizing the magnetic fluctuations in the normal state.
- DOE Contract Number:
- AC05-84OR21400
- OSTI ID:
- 7272844
- Journal Information:
- Physical Review Letters; (United States), Journal Name: Physical Review Letters; (United States) Vol. 68:9; ISSN PRLTA; ISSN 0031-9007
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
360207* -- Ceramics
Cermets
& Refractories-- Superconducting Properties-- (1992-)
ALKALINE EARTH METAL COMPOUNDS
CHALCOGENIDES
COPPER COMPOUNDS
CRYSTALS
CUPRATES
ENERGY GAP
ENERGY SPECTRA
INELASTIC SCATTERING
LANTHANUM COMPOUNDS
LANTHANUM OXIDES
MAGNETIC PROPERTIES
MAGNETIC SUSCEPTIBILITY
MONOCRYSTALS
NEUTRON PROBES
OXIDES
OXYGEN COMPOUNDS
PHYSICAL PROPERTIES
PROBES
RARE EARTH COMPOUNDS
SCATTERING
SPECTRA
SPECTRAL RESPONSE
STRONTIUM COMPOUNDS
STRONTIUM OXIDES
SUPERCONDUCTORS
TEMPERATURE DEPENDENCE
TRANSITION ELEMENT COMPOUNDS