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Charge excitations in the stripe-ordered La$$_{5/3}$$Sr$$_{1/3}$$NiO$$_{4}$$ and La$$_{2-x}$$(Ba,Sr)$$_{x}$$CuO$$_{4}$$ superconducting compounds

Wakimoto, Shuichi  ; Kimura, Hiroyuki*; Ishii, Kenji; Ikeuchi, Kazuhiko; Adachi, Tadashi*; Fujita, Masaki*; Kakurai, Kazuhisa; Koike, Yoji*; Mizuki, Junichiro; Noda, Yukio*; Yamada, Kazuyoshi*; Said, A. H.*; Shvyd'ko, Y.*

Charge excitations in stripe-ordered 214 compounds, La$$_{5/3}$$Sr$$_{1/3}$$NiO$$_{4}$$ and 1/8-doped La$$_{2-x}$$(Ba, Sr)$$_{x}$$CuO$$_{4}$$ are studied using resonant inelastic X-ray scattering in hard X-ray regime. We are observing $$simeq 1$$ eV excitations with the momentum transfer corresponding to the charge stripe spatial period both for the diagonal (nickelate) and parallel (cuprates) stripes. They are interpreted as collective stripe excitations or anomalous softening of the charge excitonic modes of the in-gap states.

Language

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English

Journal

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Physical Review Letters

Volume

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102

Number

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15

Pages

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p.157001_1 - 157001_4

Publication Year/Month

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2009/04

Meeting title

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Held date

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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/PhysRevLett.102.157001

DOI for research data

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Link to research data related to this paper/report.

Keywords

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no keyword

Research Facility

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SPring-8(大型放射光施設)

Press Release

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強く相互作用した電子の集団励起を世界で初めて観測; 高温超伝導機構解明への応用にも期待
Observation of collective excitation of strongly interacting electrons for the first time in the world; Hopes for its application in clarifying the mechanism behind high-temperature superconductivity

Article of JAEA R&D Review

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Observation of Collective Behavior of Strongly Interacting Electrons; Study of Collective Charge Excitations of Charge Stripes[/]

Cooperating Institute

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Accesses

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- Accesses

InCites™

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Percentile:74.05

Category:Physics, Multidisciplinary

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