| 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 |
Optical Conductivity Spectral Anomalies in the Off-Center Rattling System β-Ba8Ga16Sn30 |
|
言語 |
en |
| 作成者 |
Mori, Tatsuya
Iwamoto, K.
Kushibiki, S.
Honda, H.
Matsumoto, Hideki
Toyota, Naoki
Avila, Marcos A.
Suekuni, Koichiro
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) 2011 The American Physical Society |
| 主題 |
|
|
主題Scheme |
NDC |
|
主題 |
420 |
| 内容記述 |
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内容記述タイプ |
Other |
|
内容記述 |
We present optical conductivity studies of the type-I clathrate Ba_8Ga_<16>Sn_<30>, using a terahertz time-domain spectrometer (0.3-3.0 THz). The lowest-lying spectral peak at 0.72 THz due to the Ba(2) ion's off-center vibration in the oversized cage shows a drastic and anomalous temperature dependence. Below about 100 K, the single broad peak splits into two subpeaks, and with further lowering of the temperature, the spectral shape of this so-called rattling phonon shows non-Boltzmann broadening to the point that the linewidth becomes comparable to the peak frequency. Whereas the initial splitting can be understood by assuming a multiwell anharmonic potential, the strong linewidth broadening toward low temperature cannot, since the Boltzmann factor generally sharpens the low-temperature spectra. The observed behavior suggests strong interaction between the local anharmonic phonons and other excitations. |
| 出版者 |
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出版者 |
The 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 |
|
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 |
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|
識別子タイプ |
DOI |
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関連識別子 |
10.1103/PhysRevLett.106.015501 |
| 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/PhysRevLett.106.015501 |
| 収録物識別子 |
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収録物識別子タイプ |
ISSN |
|
収録物識別子 |
0031-9007 |
| 収録物識別子 |
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収録物識別子タイプ |
NCID |
|
収録物識別子 |
AA00773679 |
| 開始ページ |
|
|
開始ページ |
015501-1 |
| 書誌情報 |
Physical review letters
Physical review letters
巻 106,
号 1,
p. 015501-1-015501-4,
発行日 2011-01-06
|
| 旧ID |
31971 |
PhysRevLett_106_015501.pdf (353.0 KB)
