SR study of impurity effects on the Cu-spin fluctuations in the overdoped regime of LaSrCuZnO

Risdiana*; Adachi, Tadashi*; Oki, Naoki*; Yairi, Satoshi*; Tanabe, Yoichi*; Omori, Keisuke*; Suzuki, Takao*; Watanabe, Isao*; Koda, Akihiro*; Higemoto, Wataru; et al.

Physica C, 460-462(2), p.874 - 875, 2007/09

https://doi.org/10.1016/j.physc.2007.03.372

Zero-field muon-spin-relaxation measurements have been carried out for LaSrCuZnO (LSCO)with = 0-0.10 in the overdoped regime up to = 0.30, in order to investigate whether the dynamical stripe correlations are pinned and stabilized even for the overdoped LSCO or not. It has been found that the Zn-induced slowing down of the Cu-spin fluctuations is weakened with increasing but takes place in the overdoped regime and disappears at = 0.30. This suggests that the stripe-pinning model holds good in the whole superconducting regime of LSCO and that there is no quantum critical point at 0.19.