Spectral shift of the magnetic cross section in superconducting ${YBa}_{2}$ ${Cu}_{3}$ $O_{6 + x}$

1 April 1991

journal article
research article
Published by American Physical Society (APS) in Physical Review B

Vol. 43 (10), 8690-8693
https://doi.org/10.1103/physrevb.43.8690

Abstract

A triple-axis neutron-scattering study has been done of the magnetic correlations in three large single crystals of

{YBa}_{2}

{Cu}_{3}

O_{6 + x}

with x=0.5, 0.8, and 0.9 having

T_{c}

’s of 50, 60, and 80 K, respectively. The frequency dependence of the cross section at Q=(1/2,1/2,l) was found to peak near 5 meV for x=0.45 in an earlier study. Our data confirm that this peak shifts to ∼30 meV for x=0.5. Moreover, the low-frequency (<40 meV) spectra for x=0.8 and 0.9 become progressively suppressed with respect to those of the less oxygenated samples. These data are consistent with a picture in which the spectral weight of the magnetic scattering shifts to higher energy as the oxygen concentration x and carrier density increase.

Keywords

This publication has 12 references indexed in Scilit:

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Cited by 45 articles

Spectral shift of the magnetic cross section in superconducting YBa2Cu3O6+x

Abstract

Keywords

Spectral shift of the magnetic cross section in superconducting ${YBa}_{2}$ ${Cu}_{3}$ $O_{6 + x}$