| 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 |
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タイトル |
Glasslike versus crystalline thermal conductivity in carrier-tuned Ba8 Ga16 X30 clathrates (X=Ge,Sn) |
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言語 |
en |
| 作成者 |
Avila, M. A.
Suekuni, Koichiro
Umeo, Kazunori
Fukuoka, Hiroshi
Yamanaka, Shoji
Takabatake, Toshiro
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| アクセス権 |
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アクセス権 |
open access |
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アクセス権URI |
http://purl.org/coar/access_right/c_abf2 |
| 権利情報 |
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権利情報 |
Copyright (c) 2006 American Physical Society |
| 主題 |
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主題Scheme |
NDC |
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主題 |
420 |
| 内容記述 |
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内容記述 |
The present controversy over the origin of glasslike thermal conductivity observed in certain crystalline materials is addressed by studies on single-crystal x-ray diffraction, thermal conductivity κ (T), and specific heat Cp (T) of carrier-tuned Ba8 Ga16 X30 (X=Ge,Sn) clathrates. These crystals show radically different low-temperature κ (T) behaviors depending on whether their charge carriers are electrons or holes, displaying the usual crystalline peak in the former case and an anomalous glasslike plateau in the latter. In contrast, Cp (T) above 4 K and the general structural properties are essentially insensitive to carrier tuning. We analyze these combined results within the framework of tunneling scattering, resonant scattering, and Rayleigh scattering models, and conclude that the evolution from crystalline to glasslike κ (T) is accompanied by an increase both in the effective density of tunneling states and in the resonant scattering level, while neither one of these contributions can solely account for the observed changes in the full temperature range. This suggests that the most relevant factor that determines crystalline or glasslike behavior is the coupling strength between the guest vibrational modes and the frameworks with different charge carriers. |
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言語 |
en |
| 出版者 |
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出版者 |
American Physical Society |
| 言語 |
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言語 |
eng |
| 資源タイプ |
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資源タイプ識別子 |
http://purl.org/coar/resource_type/c_6501 |
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資源タイプ |
journal article |
| 出版タイプ |
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出版タイプ |
VoR |
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出版タイプResource |
http://purl.org/coar/version/c_970fb48d4fbd8a85 |
| 関連情報 |
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識別子タイプ |
DOI |
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関連識別子 |
10.1103/PhysRevB.74.125109 |
| 関連情報 |
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識別子タイプ |
DOI |
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関連識別子 |
http://dx.doi.org/10.1103/PhysRevB.74.125109 |
| 収録物識別子 |
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収録物識別子タイプ |
NCID |
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収録物識別子 |
AA11187113 |
| 収録物識別子 |
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収録物識別子タイプ |
ISSN |
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収録物識別子 |
1098-0121 |
| 開始ページ |
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開始ページ |
125109 |
| 書誌情報 |
Physical Review B - Condensed Matter and Materials Physics
Physical Review B - Condensed Matter and Materials Physics
巻 74,
号 12,
p. 125109,
発行日 2006-09
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| 旧ID |
16645 |
PhysRevB_74_125109.pdf (413.6 KB)
