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Ni-substitution effects on the spin dynamics and superconductivity in La$$_{1.85}$$Sr$$_{0.15}$$CuO$$_{4}$$

La$$_{1.85}$$Sr$$_{0.15}$$CuO$$_{4}$$におけるスピン揺動と超伝導性へのNi置換効果

松浦 直人*; 藤田 全基*; 平賀 晴弘*; 古府 麻衣子*   ; 木村 宏之*; 脇本 秀一  ; Perring, T. G.*; Frost, C. D.*; 山田 和芳*

Matsuura, Masato*; Fujita, Masaki*; Hiraka, Haruhiro*; Kofu, Maiko*; Kimura, Hiroyuki*; Wakimoto, Shuichi; Perring, T. G.*; Frost, C. D.*; Yamada, Kazuyoshi*

Systematic inelastic neutron scattering studies have been performed on La$$_{1.85}$$Sr$$_{0.15}$$Cu$$_{1-y}$$Ni$$_{y}$$O$$_{4}$$ in order to elucidate the microscopic mechanism of magnetic Ni impurity doping effects on spin dynamics and superconductivity. In contrast to Zn doping, which precipitates static or quasistatic spin correlations around dopant, Ni doping remarkably reduces $$E_{rm comme}$$, the minimum energy of the upward branch of the hourglass-shaped magnetic dispersion where a commensurate magnetic peak is observed. Ni doping at $$y sim 0.04$$ further reduces $$E_{rm comme}$$ to zero energy and broadens the distribution of $$E_{rm comme}$$, corresponding to the appearance of the normal state at base temperature ($$T sim 4$$ K) as well as the broadening of the superconducting transition.

使用言語

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English

掲載資料名

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Physical Review B

巻

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86

号

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13

ページ数

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p.134529_1 - 134529_8

発行年月

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2012/10

発表会議名

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開催年月

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開催都市

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開催国

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キーワード

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no keyword

特許データ

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PDF

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論文URL

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https://doi.org/10.1103/PhysRevB.86.134529

研究データの公開先DOI

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使用施設

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JRR-3M(研究炉3)  

広報プレスリリース

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論文解説記事
(成果普及情報誌)

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受委託・共同研究相手機関

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Access

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- Accesses

InCites™

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パーセンタイル：31.82

分野：Materials Science, Multidisciplinary

Altmetrics

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