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  1. 原著論文

Electronic and crystal structures of LnFeAsO1−xHx (Ln = La, Sm) studied by x-ray absorption spectroscopy, x-ray emission spectroscopy, and x- ray diffraction: II pressure dependence

https://repo.qst.go.jp/records/83021
https://repo.qst.go.jp/records/83021
f8bd5365-7dd3-4471-aee0-a1720a5c28af
Item type 学術雑誌論文 / Journal Article(1)
公開日 2021-06-23
タイトル
タイトル Electronic and crystal structures of LnFeAsO1−xHx (Ln = La, Sm) studied by x-ray absorption spectroscopy, x-ray emission spectroscopy, and x- ray diffraction: II pressure dependence
言語
言語 eng
資源タイプ
資源タイプ識別子 http://purl.org/coar/resource_type/c_6501
資源タイプ journal article
アクセス権
アクセス権 metadata only access
アクセス権URI http://purl.org/coar/access_right/c_14cb
著者 Yamamoto, Yoshiya

× Yamamoto, Yoshiya

WEKO 996972

Yamamoto, Yoshiya

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Yamaoka, Hitoshi

× Yamaoka, Hitoshi

WEKO 996973

Yamaoka, Hitoshi

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Yoshida, Masahiro

× Yoshida, Masahiro

WEKO 996974

Yoshida, Masahiro

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Jun-ichi, Yamaura

× Jun-ichi, Yamaura

WEKO 996975

Jun-ichi, Yamaura

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Ishii, Kenji

× Ishii, Kenji

WEKO 996976

Ishii, Kenji

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Onari, Seiichiro

× Onari, Seiichiro

WEKO 996977

Onari, Seiichiro

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Uozumi, Takayuki

× Uozumi, Takayuki

WEKO 996978

Uozumi, Takayuki

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Hariki, Atsushi

× Hariki, Atsushi

WEKO 996979

Hariki, Atsushi

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Kawai, Takuma

× Kawai, Takuma

WEKO 996980

Kawai, Takuma

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Taguchi, Munetaka

× Taguchi, Munetaka

WEKO 996981

Taguchi, Munetaka

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Kobayashi, Kensuke

× Kobayashi, Kensuke

WEKO 996982

Kobayashi, Kensuke

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Jung-Fu, Lin

× Jung-Fu, Lin

WEKO 996983

Jung-Fu, Lin

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Hiraoka, Nozomu

× Hiraoka, Nozomu

WEKO 996984

Hiraoka, Nozomu

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Ishii, Hirofumi

× Ishii, Hirofumi

WEKO 996985

Ishii, Hirofumi

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Ku-DIng, Tsuei

× Ku-DIng, Tsuei

WEKO 996986

Ku-DIng, Tsuei

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Okanishi, Hiroshi

× Okanishi, Hiroshi

WEKO 996987

Okanishi, Hiroshi

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Iimura, Soshi

× Iimura, Soshi

WEKO 996988

Iimura, Soshi

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Matsuishi, Satoru

× Matsuishi, Satoru

WEKO 996989

Matsuishi, Satoru

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Hosono, Hideo

× Hosono, Hideo

WEKO 996990

Hosono, Hideo

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Jun'ichiro, Mizuki

× Jun'ichiro, Mizuki

WEKO 996991

Jun'ichiro, Mizuki

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Kenji, Ishii

× Kenji, Ishii

WEKO 996992

en Kenji, Ishii

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Junichiro, Mizuki

× Junichiro, Mizuki

WEKO 996993

en Junichiro, Mizuki

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抄録
内容記述タイプ Abstract
内容記述 We examine electronic and crystal structures of iron-based superconductors LnFeAsO1−xHx (Ln = La, Sm) under pressure by means of x-ray absorption spectroscopy (XAS), x-ray emission spectroscopy (XES), and x-ray diffraction. In LaFeAsO the pre-edge peak on high-resolution XAS at the Fe-K absorption edge gains in intensity on the application of pressure up to 5.7 GPa and it saturates in the higher pressure region. We found integrated-absolute difference values on XES for Ln = La, corresponding to a spin state, decline on the application of pressure, and then it is minimized when the Tc approaches the maximum at around 5 GPa. In contrast, such the optimum value was not detected for Ln = Sm. We reveal that the superconductivity is closely related to the lower spin state for Ln = La unlike Sm case. We observed that As height from the Fe basal plane and As-Fe-As angle on the FeAs4 tetrahedron for Ln = La deviate from the optimum values of the regular tetrahedron in superconducting (SC) phase, which has been widely accepted structural guide to SC thus far. In contrast, the structural parameters were held near the optimum values up to ∼15 GPa for Ln = Sm.
書誌情報 Journal of Physics: Condensed Matter

巻 33, 号 25, p. 255603-1-255603-10, 発行日 2021-06
出版者
出版者 IOP publishing
ISSN
収録物識別子タイプ ISSN
収録物識別子 0953-8984
DOI
識別子タイプ DOI
関連識別子 10.1088/1361-648X/abfaf4
関連サイト
識別子タイプ URI
関連識別子 https://iopscience.iop.org/article/10.1088/1361-648X/abfaf4
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