A Comparison of the High-Frequency Magnetic Fluctuations in Insulating and Superconducting La2-xSrxCuO4

G. Aeppli (AT&T Bell Laboratories); H. A. Mook (Oak Ridge National Laboratory); S. M. Hayden (University of Bristol); S-W. Cheong (AT&T Bell Laboratories); T. E. Mason (University of Toronto); T. G. Perring (Rutherford Laboratory); Z. Fisk (Florida State University)

arxiv: cond-mat/9611179 · v1 · submitted 1996-11-22 · ❄️ cond-mat.supr-con

A Comparison of the High-Frequency Magnetic Fluctuations in Insulating and Superconducting La2-xSrxCuO4

S. M. Hayden (University of Bristol) , G. Aeppli (AT&T Bell Laboratories) , H. A. Mook (Oak Ridge National Laboratory) , T. G. Perring (Rutherford Laboratory) , T. E. Mason (University of Toronto) , S-W. Cheong (AT&T Bell Laboratories) , Z. Fisk (Florida State University) This is my paper

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keywords comparisonenergyfluctuationsinsulatingla2-xsrxcuo4magneticsuperconductingabsolute

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Inelastic neutron scattering performed at a spallation source is used to make absolute measurements of the dynamic susceptibility of insulating La2CuO4 and superconducting La2-xSrxCuO4 over the energy range 15<EN<350 meV. The effect of Sr doping on the magnetic excitations is to cause a large broadening in wavevector and a substantial change in the spectrum of the local spin fluctuations. Comparison of the two compositions reveals a new energy scale of 22 meV in La1.86Sr0.14CuO4.

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A Comparison of the High-Frequency Magnetic Fluctuations in Insulating and Superconducting La2-xSrxCuO4

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