title: Cu NQR study of the stripe phase local structure in the lanthanum cuprates
abstract: Using Cu nuclear quadrupole resonance (NQR) in Eu-doped La2-xSrxCuO4 we find the evidence of the pinned stripe phase at 1.3 K for 0. 08</=x</=0.18. The pinned fraction increases by 1 order of magnitude near hole doping x = 1/8. The NQR line shape reveals three inequivalent Cu positions: (i) sites in the charged stripe, (ii) nonmagnetic sites outside the stripes, and (iii) sites with a magnetic moment of 0.29&mgr;(B) in the antiferromagnetically correlated regions. 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.
authors.affiliation: Institute for Technical Physics, 420029 Kazan, Russia.
authors.initials: GB
authors.lastname: Teitel'baum
authors.initials: B
authors.lastname: Buchner
authors.lastname: de Gronckel H