Abstract:We present an enhanced diffusion of nuclear spin polarization in fractional quantum Hall domain phases at ν = 2/3. Resistively-detected NMR mediated by electrically driven domain-wall motion is used as a probe of local nuclear polarization, manifesting pumping-dependent signal saturation behavior. This reveals that a relatively homogeneous polarization profile spreads even to places distant from pinning centers of the domain walls. We attribute this to the fact that the pumped nuclear polarization near the dom… Show more
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