TY - JOUR
T1 - Spectral shift of the magnetic cross section in superconducting YBa2Cu3O6+x
AU - Bourges, P.
AU - Gehring, P. M.
AU - Hennion, B.
AU - Moudden, A. H.
AU - Tranquada, J. M.
AU - Shirane, G.
AU - Shamoto, S.
AU - Sato, M.
PY - 1991
Y1 - 1991
N2 - A triple-axis neutron-scattering study has been done of the magnetic correlations in three large single crystals of YBa2Cu3O6+x with x=0.5, 0.8, and 0.9 having Tcs 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.
AB - A triple-axis neutron-scattering study has been done of the magnetic correlations in three large single crystals of YBa2Cu3O6+x with x=0.5, 0.8, and 0.9 having Tcs 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.
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U2 - 10.1103/PhysRevB.43.8690
DO - 10.1103/PhysRevB.43.8690
M3 - Article
AN - SCOPUS:0344452981
SN - 0163-1829
VL - 43
SP - 8690
EP - 8693
JO - Physical Review B
JF - Physical Review B
IS - 10
ER -