J. Phys. I France
Volume 2, Numéro 2, February 1992
Page(s) 181 - 192
DOI: 10.1051/jp1:1992132
J. Phys. I France 2 (1992) 181-192

Antiferromagnetic fluctuations and neutron scattering in high- ${T_{\rm c}}$ superconductors

S.V. Maleyev

Leningrad Nuclear Physics Institute, Gatchina, Leningrad 188350, U.S.S.R.

(Received 28 August 1991, revised 19 September 1991, accepted 8 November 1991)

The magnetic neutron scattering data in the high ${T_{\rm c}}$ superconductors are discussed and an attempt of their theoretical interpretation is given. It is shown that the conventional Fermi liquid theory is incapable to explain the data above ${T_{\rm c}}$, but they strongly support the nested Fermi liquid theory. This theory predicts strong anisotropy of the scattering in the plane perpendicular to the magnetic rod. The observation of this anisotropy would be a crucial experiment for this theory. Experimental data below ${T_{\rm c}}$ are qualitatively explained in the frame of the Abrikosov-Gorkov theory of the superconductivity with a magnetic disorder.

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