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New magnetic coherence effect in superconducting La_{2-x}Sr_{x}CuO_{4}

T. E. Mason·A. Schroder·G. Aeppli·H. A. Mook·S. M. Hayden
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Abstract

We have used inelastic neutron scattering to examine the magnetic fluctuations at intermediate frequencies in the simplest high temperature superconductor, La_{2-x}Sr_{x}Cu_{4}. The suppression of the low energy magnetic response in the superconducting state is accompanied by an increase in the response at higher energies. Just above a threshold energy of ~7 meV there is additional scattering present below T_{c} which is characterised by an extraordinarily long coherence length, in excess of 50 Å.

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T. E. Mason, A. Schroder, G. Aeppli, H. A. Mook, S. M. Hayden. 1996-10-01. New magnetic coherence effect in superconducting La_{2-x}Sr_{x}CuO_{4}. https://doi.org/10.1103/physrevlett.77.1604

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