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Raman scattering investigation of RB6 (R=Ca, La, Ce, Pr, Sm, Gd, Dy, and Yb)

https://hiroshima.repo.nii.ac.jp/records/2008230
https://hiroshima.repo.nii.ac.jp/records/2008230
01ce91ec-4e99-402c-b748-381668f9a54e
名前 / ファイル ライセンス アクション
PhysRevB_68_224305.pdf PhysRevB_68_224305.pdf (243.4 KB)
Item type デフォルトアイテムタイプ_(フル)(1)
公開日 2023-03-18
タイトル
タイトル Raman scattering investigation of RB6 (R=Ca, La, Ce, Pr, Sm, Gd, Dy, and Yb)
言語 en
作成者 Ogita, Norio

× Ogita, Norio

en Ogita, Norio

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Nagai, Shinji

× Nagai, Shinji

en Nagai, Shinji

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Okamoto, Naoki

× Okamoto, Naoki

en Okamoto, Naoki

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Udagawa, Masayuki

× Udagawa, Masayuki

en Udagawa, Masayuki

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Iga, Fumitoshi

× Iga, Fumitoshi

en Iga, Fumitoshi

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Sera, Masafumi

× Sera, Masafumi

en Sera, Masafumi

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Akimitsu, Jun

× Akimitsu, Jun

en Akimitsu, Jun

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Kunii, Satoru

× Kunii, Satoru

en Kunii, Satoru

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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) 2003 American Physical Society.
内容記述
内容記述 The excitation-energy, polarization, and temperature dependeces of Raman scattering spectra have been measured for the RB6 crystals (R=Ca 2+, La3+, Ce3+, Pr3+, Sm 2.6+, Gd3+, Dy3+, and Yb2+). In the divalent crystals of CaB6 and YbB6, the Eg phonon shows doublet, while the line shape is a broad single peak for the trivalent case. In the trivalent crystals, two kinds of the extra peaks have been clearly observed at around 200 cm-1 and at around 1400 cm -1 in addition to the Raman-active phonons and crystal electric-field (CEF) excitations. The peak intensities at around 200 cm -1 show the anomalous decrease with decreasing temperature, and this temperature dependence correlates with that of the mean-square displacement of the R ion. Furthermore, their energies decrease with the increase of the cage space due to B6. These peaks are originated from the second-order excitation of acoustic phonons. The broad peak at around 1400 cm-1 is assigned as the second-order excitation of the T2g phonon. For the T2g phonon, the energy difference and its line-shape change between the trivalent and divalent crystals suggests the existence of electron-phonon interaction. We have observed the CEF excitation in PrB 6 and have obtained the Lea, Leask, and Wolf parameters with x=0.94 and W=9.2 K.
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.68.224305
関連情報
識別子タイプ DOI
関連識別子 http://dx.doi.org/10.1103/PhysRevB.68.224305
収録物識別子
収録物識別子タイプ ISSN
収録物識別子 0163-1829
収録物識別子
収録物識別子タイプ NCID
収録物識別子 AA11187113
開始ページ
開始ページ 224305-1
書誌情報 Physical Review B - Condensed Matter and Materials Physics
Physical Review B - Condensed Matter and Materials Physics

巻 68, 号 22, p. 224305-1-224305-9, 発行日 2003-12-30
旧ID 18722
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