The direct Cu NQR Study of the Stripe Phase in the Lanthanum Cuprates
Abstract
Using Cu NQR in Eu-doped La(2-x)SrxCuO4 we find the evidence of the pinned stripe phase at 1.3K for 0.08<x<0.18. The pinned fraction increases by one order of magnitude near hole doping x=1/8. The NQR lineshape reveals three inequivalent Cu positions. A dramatic change of the NQR signal for x > 0.18 correlating with the onset of bulk superconductivity corresponds to the depinning of the stripe phase.
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