CL-35 NQR IN INCOMMENSURATE BIS(4-CHLOROPHENYL) SULFONE

The temperature dependence of the Cl-35 NQR spectra has been measured for Iq modulated incommensurate bis(4-chlorophenyl) sulfone between 30 0 and 6 K. Large thermal fluctuations of the modulation wave are found to smear out the typical incommensurate edge singularities over a ran ge of 10 K below the paraelectric-incommensurate transition T-I. The g radual evolution of the modulation wave from the plane wave to the bro ad multisoliton lattice regime has been observed. The soliton density n(s) says however high over the whole incommensurate phase.