Comparison of the high-frequency magnetic fluctuations in insulating and superconducting La{sub 2{minus}{ital x}}Sr{sub {ital x}}CuO{sub 4}
Journal Article
·
· Physical Review Letters
- H. H. Wills Physics Laboratory, University of Bristol, Tyndall Avenue, Bristol BS8 1TL (United Kingdom)
Inelastic neutron scattering performed at a spallation source is used to make absolute measurements of the dynamic susceptibility of insulating La{sub 2}CuO{sub 4} and superconducting La{sub 1.86}Sr{sub 0.14}CuO{sub 4} over the energy range 15{le}{h_bar}{omega}{le}350 meV. The effect of Sr doping on the magnetic excitations is to cause a large broadening in wave vector and a substantial change in the spectrum of the local spin fluctuations. Comparison of the two compositions reveals a new energy scale {sq_bullet}{Gamma}=22{plus_minus}5 meV in La{sub 1.86}Sr{sub 0.14}CuO{sub 4}. {copyright} {ital 1996 The American Physical Society.}
- OSTI ID:
- 284535
- Journal Information:
- Physical Review Letters, Journal Name: Physical Review Letters Journal Issue: 8 Vol. 76; ISSN 0031-9007; ISSN PRLTAO
- Country of Publication:
- United States
- Language:
- English
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