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$$mu$$SR study of impurity effects on the Cu-spin fluctuations in the overdoped regime of La$$_{2-x}$$Sr$$_x$$Cu$$_{1-y}$$Zn$$_y$$O$$_4$$

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

Zero-field muon-spin-relaxation measurements have been carried out for La$$_{2-x}$$Sr$$_x$$Cu$$_{1-y}$$Zn$$_y$$O$$_4$$ (LSCO)with $$y$$ = 0-0.10 in the overdoped regime up to $$x$$ = 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 $$x$$ but takes place in the overdoped regime and disappears at $$x$$ = 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 $$x$$ $$sim$$ 0.19.



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Category:Physics, Applied



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