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However, the origin of the high Tc in (Ga,Fe)Sb remains to be elucidated. To address this issue, we use resonant photoemission spectroscopy (RPES) and first-principles calculations to investigate the x dependence of the Fe 3d states in [Formula: see text] (x = 0.05, 0.15, and 0.25) thin films. The observed Fe 2p-3d RPES spectra reveal that the Fe-3d impurity band (IB) crossing the Fermi level becomes broader with increasing x, which is qualitatively consistent with the picture of double-exchange interaction. Comparison between the obtained Fe-3d partial density of states and the first-principles calculations suggests that the Fe-3d IB originates from the minority-spin (↓) e states. 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Evolution of Fe 3d impurity band state as the origin of high Curie temperature in the p-type ferromagnetic semiconductor (Ga,Fe)Sb
https://oist.repo.nii.ac.jp/records/1935
https://oist.repo.nii.ac.jp/records/1935828a9b44-9f96-4cce-b2e7-bdafa6e2bbb4
名前 / ファイル | ライセンス | アクション |
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Takeda-2020-Evolution of Fe 3d impurity band s (817.4 kB)
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Item type | 学術雑誌論文 / Journal Article(1) | |||||
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公開日 | 2021-02-17 | |||||
タイトル | ||||||
言語 | en | |||||
タイトル | Evolution of Fe 3d impurity band state as the origin of high Curie temperature in the p-type ferromagnetic semiconductor (Ga,Fe)Sb | |||||
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 | |||||
著者(英) |
Takeda, Takahito
× Takeda, Takahito× Sakamoto, Shoya× Araki, Kohsei× Fujisawa, Yuita× Anh, Le Duc× Thanh Tu, Nguyen× Takeda, Yukiharu× Fujimori, Shin-ichi× Fujimori, Atsushi× Tanaka, Masaaki× Kobayashi, Masaki |
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書誌情報 |
en : Physical Review B 巻 102, 号 24, p. 245203, 発行日 2020-12-23 |
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抄録 | ||||||
内容記述タイプ | Other | |||||
内容記述 | [Formula: see the attached file] is one of the promising ferromagnetic semiconductors for spintronic device applications because its Curie temperature (Tc) is above 300 K when the Fe concentration x is equal to or higher than similar to ∼0.20. However, the origin of the high Tc in (Ga,Fe)Sb remains to be elucidated. To address this issue, we use resonant photoemission spectroscopy (RPES) and first-principles calculations to investigate the x dependence of the Fe 3d states in [Formula: see text] (x = 0.05, 0.15, and 0.25) thin films. The observed Fe 2p-3d RPES spectra reveal that the Fe-3d impurity band (IB) crossing the Fermi level becomes broader with increasing x, which is qualitatively consistent with the picture of double-exchange interaction. Comparison between the obtained Fe-3d partial density of states and the first-principles calculations suggests that the Fe-3d IB originates from the minority-spin (↓) e states. The results indicate that enhancement of the double-exchange interaction between e↓ electrons with increasing x is the origin of the high Tc in (Ga,Fe)Sb. | |||||
出版者 | ||||||
出版者 | American Physical Society | |||||
ISSN | ||||||
収録物識別子タイプ | ISSN | |||||
収録物識別子 | 2469-9950 | |||||
ISSN | ||||||
収録物識別子タイプ | ISSN | |||||
収録物識別子 | 2469-9969 | |||||
DOI | ||||||
関連タイプ | isIdenticalTo | |||||
識別子タイプ | DOI | |||||
関連識別子 | info:doi/10.1103/PhysRevB.102.245203 | |||||
権利 | ||||||
権利情報 | © 2020 American Physical Society. | |||||
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.102.245203 | |||||
著者版フラグ | ||||||
出版タイプ | VoR | |||||
出版タイプResource | http://purl.org/coar/version/c_970fb48d4fbd8a85 |