期刊
PHYSICAL REVIEW LETTERS
卷 84, 期 13, 页码 2949-2952出版社
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevLett.84.2949
关键词
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Using Cu nuclear quadrupole resonance (NQR) in Eu-doped La2-xSrxCuO4 we find the evidence of the pinned stripe phase at 1.3 K fur 0.08 less than or equal to x less than or equal to 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 mu(B) in the antiferromagnetically correlated regions. A dramatic change of the NQR signal for x > 0.18 correlating with the onset of bulb superconductivity corresponds to the depinning of the stripe phase.
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