Pulsed NQR at the frequencies of 28-33 MHz has been used to study copper NQR spectra in YBa{ 2}Cu{ 3}O{ 7}, TmBa{ 2}Cu{ 3}O{ 7} and Y{ 0.9}Pr{ 0.1}Ba{ 2}Cu{ 3}O{ 7} compounds at temperatures of 4.2-200K. Quantitative analysis of the spectra has shown that the "plane" Cu(2) spectra shape is well described by using a model of 1D correlations of charge and spin distribution in CuO{ 2} planes (stripe correlations). In the undoped superconductors the charge-spin stripe structure moves fast in the CuO{ 2} planes, but doping the YBa{ 2}Cu{ 3}O{ 7} lattice with praseodymium slows this motion down.
Categories: cond-mat.supr-con