Stripe motion in CuO{2} planes of Y{1-x}Pr{x}Ba{2}Cu{3}O{7} as seen from the Cu(2) NQR

TL;DR

This study uses pulsed NQR to investigate stripe correlations in CuO2 planes of various cuprates, revealing how doping with praseodymium affects charge and spin stripe dynamics.

Contribution

It provides a quantitative analysis of Cu(2) NQR spectra showing stripe correlations and their doping-dependent dynamics in cuprate superconductors.

Findings

Stripe correlations are well described by 1D charge-spin models.

Doping with praseodymium slows stripe motion in CuO2 planes.

Charge-spin stripe structures are dynamic in undoped superconductors.

Abstract

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.