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Effects of Y substitution on the electronic structure and charge dynamics of SmS
http://hdl.handle.net/2237/00032333
http://hdl.handle.net/2237/000323330d5cc725-642e-4d2f-80d6-e050093a3ec3
| 名前 / ファイル | ライセンス | アクション |
|---|---|---|
PhysRevB_100_245143 (1.2 MB)
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| Item type | 学術雑誌論文 / Journal Article(1) | |||||
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| 公開日 | 2020-06-10 | |||||
| タイトル | ||||||
| タイトル | Effects of Y substitution on the electronic structure and charge dynamics of SmS | |||||
| 言語 | en | |||||
| 著者 |
Yokoyama, Y.
× Yokoyama, Y.× Hasegawa, H.× Mizuno, Y.× Asai, D.× Okamoto, Y.× Suzuki, H. S.× Takehana, K.× Imanaka, Y.× Takenaka, K. |
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| アクセス権 | ||||||
| アクセス権 | open access | |||||
| アクセス権URI | http://purl.org/coar/access_right/c_abf2 | |||||
| 権利 | ||||||
| 言語 | en | |||||
| 権利情報 | © 2019 American Physical Society | |||||
| 抄録 | ||||||
| 内容記述タイプ | Abstract | |||||
| 内容記述 | Evolution of the electronic state by Y doping was explored by optical conductivity covering a wide energy and compositional region deduced from systematic reflectivity measurements of Sm1−xYxS single crystals. Although electrons doped onto the 5d band by Y dopants immediately realize a metallic state, the charge dynamics do not obey a simple Drude response and the spectral intensity is condensed in the mid-infrared region. Contrary to the pressure-induced case, a metallic phase appears in a certain compositional region before reaching the valence transition. The Fermi level is shifted upwards by electron doping. Therefore, the 5d band must overlap with the weakly dispersive 4f band more deeply than in the pressure-induced case to reach the valence transition, which can explain the stability of the divalent phase up to higher temperatures in the doped system than in the pressure-induced case. The present optical study provides us with a strategy that sulfur deficiency might increase operating temperature of negative thermal expansion in this system. | |||||
| 言語 | en | |||||
| 出版者 | ||||||
| 出版者 | American Physical Society | |||||
| 言語 | en | |||||
| 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 | |||||
| 出版タイプ | ||||||
| 出版タイプ | VoR | |||||
| 出版タイプResource | http://purl.org/coar/version/c_970fb48d4fbd8a85 | |||||
| DOI | ||||||
| 関連タイプ | isVersionOf | |||||
| 識別子タイプ | DOI | |||||
| 関連識別子 | https://doi.org/10.1103/PhysRevB.100.245143 | |||||
| ISSN（print） | ||||||
| 収録物識別子タイプ | PISSN | |||||
| 収録物識別子 | 2469-9950 | |||||
| 書誌情報 |
en : Physical Review B 巻 100, 号 24, p. 245143, 発行日 2019-12-24 |
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| 著者版フラグ | ||||||
| 値 | publisher | |||||
