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

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.

Language

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English

Journal

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Physical Review B

Volume

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86

Number

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13

Pages

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p.134529_1 - 134529_8

Publication Year/Month

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2012/10

Meeting title

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Held date

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Location (city)

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Location (country)

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Patent information

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PDF

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Paper URL

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

DOI for research data

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Keywords

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no keyword

Research Facility

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JRR-3M(研究炉3)  

Press Release

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Article of JAEA R&D Review

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Cooperating Institute

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Accesses

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- Accesses

InCites™

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Percentile:31.92

Category:Materials Science, Multidisciplinary

Altmetrics

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