Stripe motion in CuO2 planes of Y1-xPrxBa2Cu3O7 as seen from the Cu(2) NQR
Abstract
Pulsed NQR at the frequencies of 28-33 MHz has been used to study copper NQR spectra in YBa2Cu3O7, TmBa2Cu3O7 and Y0.9Pr0.1Ba2Cu3O7 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 CuO2 planes (stripe correlations). In the undoped superconductors the charge-spin stripe structure moves fast in the CuO2 planes, but doping the YBa2Cu3O7 lattice with praseodymium slows this motion down.
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