Time-scale of the intra-unit-cell magnetism in high-Tc cuprates
The phase diagram of high temperature superconductors is dominated by a pseudo-gap phase with highly unusual physical properties. Polarized neutron scattering experiments reported the appearance of an intra-unit cell magnetism when entering the PG state in four different cuprate families. However, other magnetic probes such as muons spin resonance (uSR) and nuclear magnetic resonance experiments could not see the static local fields expected for the magnetic order. Nevertheless, a recent uSR study reports a dynamic relaxation rate in longitudinal applied field in single crystals of YBa2Cu3O6+x. The amplitude of the fluctuating magnetic fields is of the order of the magnitude deduced from polarized neutron diffraction. The magnetic correlations are fluctuating at about 10^8 Hz at low temperature, corresponding to Fourier time varying in the range [0.01-20]ns. Our previous neutron spin echo experiment shows the existence of a magnetic scattering possibly associated with such fluctuations. We ask for 10 days on the Neutron Wide Angle Spin Echo Spectrometer WASP to further study this magnetism and determine the time-scale of the possibly associated fluctuations.
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The recommended format for citing this dataset in a research publication is in the following format:
BOUNOUA Dalila; Bourges; FOUQUET Peter; MANGIN-THRO Lucile; MARTIN Nicolas and SIDIS Yvan. (2021). Time-scale of the intra-unit-cell magnetism in high-Tc cuprates. Institut Laue-Langevin (ILL) doi:10.5291/ILL-DATA.4-02-588
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