J. Rossatmignod et al., SPIN DYNAMICS IN THE HIGH-T(C) SYSTEM YBA2CU3O(6- THE HEAVILY-DOPED REGIME(X) ), Physica. B, Condensed matter, 199, 1994, pp. 281-283
Inelastic neutron scattering experiments have been carried out on YBa2
Cu3O6+x single crystals, and we report here on the behaviour of the sp
in dynamics in the heavily hole-doped regime 0.6 < x < 0.94. The dynam
ic AF-correlations remain; the in-plane q-width increases with doping
and the AF-coupling between CuO2 layers is not affected. Below T(c) Im
chi exhibits a gap and an enhancement at energies which increase with
hole doping. Moreover a pseudo-gap persists above T(c).