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  1. 原著論文

Electronic and crystal structures of (Na1−xCax)Cr2O4 with anomalous colossal magnetoresistance

https://repo.qst.go.jp/records/81433
https://repo.qst.go.jp/records/81433
46499b96-2f0e-45dc-99c8-b2f828b436f6
Item type 学術雑誌論文 / Journal Article(1)
公開日 2020-12-24
タイトル
タイトル Electronic and crystal structures of (Na1−xCax)Cr2O4 with anomalous colossal magnetoresistance
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 Yamaoka, Hitoshi

× Yamaoka, Hitoshi

WEKO 1011145

Yamaoka, Hitoshi

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F. Schwier, Eike

× F. Schwier, Eike

WEKO 1011146

F. Schwier, Eike

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Yamamoto, Yoshiya

× Yamamoto, Yoshiya

WEKO 1011147

Yamamoto, Yoshiya

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Nakatake, Masashi

× Nakatake, Masashi

WEKO 1011148

Nakatake, Masashi

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Sawada, Masahiro

× Sawada, Masahiro

WEKO 1011149

Sawada, Masahiro

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Sakurai, Hiroya

× Sakurai, Hiroya

WEKO 1011150

Sakurai, Hiroya

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Tsujii, Naohito

× Tsujii, Naohito

WEKO 1011151

Tsujii, Naohito

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Arita, Masashi

× Arita, Masashi

WEKO 1011152

Arita, Masashi

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Iwasawa, Hideaki

× Iwasawa, Hideaki

WEKO 1011153

Iwasawa, Hideaki

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Taguchi, Munetaka

× Taguchi, Munetaka

WEKO 1011154

Taguchi, Munetaka

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Shimada, Kenya

× Shimada, Kenya

WEKO 1011155

Shimada, Kenya

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Jun’ichiro, Mizuki

× Jun’ichiro, Mizuki

WEKO 1011156

Jun’ichiro, Mizuki

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Hideaki, Iwasawa

× Hideaki, Iwasawa

WEKO 1011157

en Hideaki, Iwasawa

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抄録
内容記述タイプ Abstract
内容記述 The electronic and crystal structures of (Na1−xCax)Cr2O4 have been studied in detail by combining photoelectron spectroscopy (PES), x-ray absorption spectroscopy (XAS), and x-ray diffraction (XRD). The PES results suggest a gap opening at the Fermi level with decreasing temperature and/or increasing the Ca concentration. The XAS spectra at the O K-absorption edge suggest a slight increase of the O 2p–Cr 3d hybridization at low temperatures in NaCr2O4 and Na0.8Ca0.2Cr2O4, which corresponds to the appearance of the antiferromagnetic order. However, XRD showed no corresponding structural transition. The experimental results were compared with spin-resolved density functional theory (DFT) calculations. In Na1−xCaxCr2O4 the pre-edge intensity of the XAS spectra at the O K-absorption edge is strongly suppressed with increasing x, in accordance with the gap opening by Ca doping. This observation is consistent with the DFT calculation, where the density of states just above and below the Fermi level diminishes as the electron is doped into NaCr2O4.
書誌情報 Physical Review B

巻 102, p. 235150, 発行日 2020-12
出版者
出版者 アメリカ物理学会
ISSN
収録物識別子タイプ ISSN
収録物識別子 2469-9950
DOI
識別子タイプ DOI
関連識別子 10.1103/PhysRevB.102.235150
関連サイト
識別子タイプ URI
関連識別子 https://journals.aps.org/prb/abstract/10.1103/PhysRevB.102.235150
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