Low-energy incommensurate spin excitations in superconducting La[sub 1. 85]Sr[sub 0. 15]CuO[sub 4]
Journal Article
·
· Physical Review, B: Condensed Matter; (United States)
- Department of Physics, Brookhaven National Laboratory, Upton, New York 11973 (United States)
- Department of Physics, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139 (United States)
- Department of Physics, Tohoku University, Sendai 980 (Japan)
- Inorganic Synthesis Facility, Engineering Faculty, Yamanashi University, Kofu 400 (Japan)
Neutron-scattering experiments with markedly improved signal-to-noise ratios have been performed on single-crystal superconducting La[sub 1.85]Sr[sub 0.15]CuO[sub 4] ([ital T][sub [ital c]]=33 K) at energies down to 1.5 meV. The measurements provide quantitative information on the temperature dependence of [chi][prime][prime]([bold q],[omega]). Surprisingly, [chi][prime][prime]([bold q][sub peak],[omega]) is approximately constant below [ital T][sub [ital c]] for the measured energies 1.5 meV[le][omega][le]6 meV, that is, for energies much less than the mean-field BCS gap energy of [similar to]10 meV, hence implying other than conventional [ital s]-wave superconductivity.
- DOE Contract Number:
- AC02-76CH00016
- OSTI ID:
- 7018314
- Journal Information:
- Physical Review, B: Condensed Matter; (United States), Journal Name: Physical Review, B: Condensed Matter; (United States) Vol. 46:14; ISSN PRBMDO; ISSN 0163-1829
- Country of Publication:
- United States
- Language:
- English
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Mon Oct 31 23:00:00 EST 1994
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Related Subjects
36 MATERIALS SCIENCE
360204 -- Ceramics
Cermets
& Refractories-- Physical Properties
360207* -- Ceramics
Cermets
& Refractories-- Superconducting Properties-- (1992-)
ALKALINE EARTH METAL COMPOUNDS
BCS THEORY
CHALCOGENIDES
COPPER COMPOUNDS
COPPER OXIDES
ENERGY GAP
HIGH-TC SUPERCONDUCTORS
LANTHANUM COMPOUNDS
MAGNETIC PROPERTIES
MAGNETIC SUSCEPTIBILITY
NEUTRON SPECTROSCOPY
OXIDES
OXYGEN COMPOUNDS
PHYSICAL PROPERTIES
RARE EARTH COMPOUNDS
SPECTROSCOPY
SPIN WAVES
STRONTIUM COMPOUNDS
SUPERCONDUCTORS
TEMPERATURE DEPENDENCE
TRANSITION ELEMENT COMPOUNDS
360204 -- Ceramics
Cermets
& Refractories-- Physical Properties
360207* -- Ceramics
Cermets
& Refractories-- Superconducting Properties-- (1992-)
ALKALINE EARTH METAL COMPOUNDS
BCS THEORY
CHALCOGENIDES
COPPER COMPOUNDS
COPPER OXIDES
ENERGY GAP
HIGH-TC SUPERCONDUCTORS
LANTHANUM COMPOUNDS
MAGNETIC PROPERTIES
MAGNETIC SUSCEPTIBILITY
NEUTRON SPECTROSCOPY
OXIDES
OXYGEN COMPOUNDS
PHYSICAL PROPERTIES
RARE EARTH COMPOUNDS
SPECTROSCOPY
SPIN WAVES
STRONTIUM COMPOUNDS
SUPERCONDUCTORS
TEMPERATURE DEPENDENCE
TRANSITION ELEMENT COMPOUNDS