Stripe motion in CuO2 planes of Y1-xPrxBa2Cu3O7 as seen from the Cu(2) NQR
M. A. Teplov, Yu. A. Sakhratov, A. V. Dooglav, A. V. Egorov, E. V. Krjukov, O. P. Zaitsev
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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