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Structural distortion and suppression of superconductivity in stoichiometric B1-MoN epitaxial thin films
https://hiroshima.repo.nii.ac.jp/records/2008263
https://hiroshima.repo.nii.ac.jp/records/2008263eb738c8e-5122-4337-9663-eeb9e15e9962
| 名前 / ファイル | ライセンス | アクション |
|---|---|---|
PhysRevB_73_052504.pdf (133.1 KB)
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| Item type | デフォルトアイテムタイプ_（フル）(1) | |||||||||||
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| 公開日 | 2023-03-18 | |||||||||||
| タイトル | ||||||||||||
| タイトル | Structural distortion and suppression of superconductivity in stoichiometric B1-MoN epitaxial thin films | |||||||||||
| 言語 | en | |||||||||||
| 作成者 |
Inumaru, Kei
× Inumaru, Kei
× Baba, Kazuya
× Yamanaka, Shoji
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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 | |||||||||||
| 権利情報 | ||||||||||||
| 権利情報 | Copyright (c) 2006 American Physical Society | |||||||||||
| 主題 | ||||||||||||
| 主題Scheme | NDC | |||||||||||
| 主題 | 420 | |||||||||||
| 内容記述 | ||||||||||||
| 内容記述 | Molybdenum nitride films with the NaCl structure (B1-MoN) were epitaxially grown on α- Al2 O3 (001) and MgO(001) substrates at 973 K by pulsed laser deposition (PLD) under nitrogen radical irradiation. The highly crystalline epitaxial films enabled us to determine the three-dimensional cell parameters, which was motivated by theoretical calculations that B1-MoN, a predicted superconductor, is elastically unstable against tetragonal and trigonal distortions. On α- Al2 O3 (001), the B1-MoN phase (composition, Mo1 N0.98) was grown with its (111) planes parallel to the substrate surface. X-ray diffraction analysis with a multiaxes diffractometer detected only a small trigonal lattice distortion [a=0.4219(3) nm, α=89.28(5)°] with an expansion along the [111] direction perpendicular to the substrate surface. The film grown on MgO(001) had the MoN1.03 composition and showed a slight tetragonal distortion (a=0.4213 and c=0.424 nm) due to fitting to the MgO substrate lattice (a=0.4213 nm). These two stoichiometric films showed no superconductivity above 2 K. A lower nitrogen content (MoN0.86) film was obtained on α- Al2 O3 (001) using a higher deposition rate. The corresponding film had a much smaller lattice constant [a=0.4184(3) nm], and a similar distortion [α=89.41(5)°]. The B1- MoN0.86 film showed superconductivity with a transition temperature Tc =4.2 K. The suppression of the superconductivity of the former stoichiometric phase can be interpreted in terms of the lattice expansion. | |||||||||||
| 言語 | en | |||||||||||
| 出版者 | ||||||||||||
| 出版者 | American Physical Society | |||||||||||
| 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 | |||||||||||
| 関連情報 | ||||||||||||
| 識別子タイプ | DOI | |||||||||||
| 関連識別子 | 10.1103/PhysRevB.73.052504 | |||||||||||
| 関連情報 | ||||||||||||
| 識別子タイプ | DOI | |||||||||||
| 関連識別子 | http://dx.doi.org/10.1103/PhysRevB.73.052504 | |||||||||||
| 収録物識別子 | ||||||||||||
| 収録物識別子タイプ | NCID | |||||||||||
| 収録物識別子 | AA11187113 | |||||||||||
| 収録物識別子 | ||||||||||||
| 収録物識別子タイプ | ISSN | |||||||||||
| 収録物識別子 | 1098-0121 | |||||||||||
| 開始ページ | ||||||||||||
| 開始ページ | 052504 | |||||||||||
| 書誌情報 |
Physical Review B - Condensed Matter and Materials Physics Physical Review B - Condensed Matter and Materials Physics 巻 73, 号 5, p. 052504, 発行日 2006 |
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| 旧ID | 16633 | |||||||||||
