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About anomalous ultrasound attenuation in aerogels filled in by liquid 4He below Tλ
https://doi.org/10.24517/00011033
https://doi.org/10.24517/0001103300a2667f-c132-4b2b-b879-32857d811339
| 名前 / ファイル | ライセンス | アクション |
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SC-PR-MATSUMOTO-32109.pdf (107.3 kB)
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| Item type | 会議発表論文 / Conference Paper(1) | |||||||
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| 公開日 | 2017-10-03 | |||||||
| タイトル | ||||||||
| タイトル | About anomalous ultrasound attenuation in aerogels filled in by liquid 4He below Tλ | |||||||
| 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_5794 | |||||||
| 資源タイプ | conference paper | |||||||
| ID登録 | ||||||||
| ID登録 | 10.24517/00011033 | |||||||
| ID登録タイプ | JaLC | |||||||
| 著者 |
Tayurskii, A.
× Tayurskii, A.× Badrutdinov, O. R.× Matsumoto, Koichi |
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| 著者別表示 |
松本, 宏一
× 松本, 宏一
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| 提供者所属 | ||||||||
| 内容記述タイプ | Other | |||||||
| 内容記述 | 金沢大学理工研究域数物科学系 | |||||||
| 書誌情報 |
Journal of Physics: Conference Series 巻 150, 号 3, p. 32109, 発行日 2009-01-01 |
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| ISSN | ||||||||
| 収録物識別子タイプ | ISSN | |||||||
| 収録物識別子 | 1742-6588 | |||||||
| DOI | ||||||||
| 関連タイプ | isVersionOf | |||||||
| 識別子タイプ | DOI | |||||||
| 関連識別子 | 10.1088/1742-6596/150/3/032109 | |||||||
| 出版者 | ||||||||
| 出版者 | Institute of Physics | |||||||
| 抄録 | ||||||||
| 内容記述タイプ | Abstract | |||||||
| 内容記述 | In the present work we propose the explanation of the recently observed at temperatures about 1.7 K anomalous ultrasound attenuation in high-porous aerogels filled in by liquid 4He by means of 2D-3D roton transformations. The existence of so-called 2D rotons in the system "aerogel-liquid 4He" has been found early in the experiments on inelastic neutron scattering T < 1.5 K where the spectrum of roton excitations is well-defined. The difference in energies of 3D-rotons and 2D-rotons at low temperatures exceeds the energy of acoustic phonons and the process of transformation of 2D-roton to 3D-roton is forbidden by energy conservation law. But with increasing temperature the 2D-roton and 3D-roton states begin to be broadened (the lifetime of excitations is decreasing) and possibility of the mutual transformation of rotons with the participation of a phonon appears. The further increasing of temperature leads to the essential decreasing of superfluid density and the efficiency of the proposed mechanism decreases too. Numerical simulations show the qualitative agreement of the proposed mechanism with the observed data. © 2009 IOP Publishing Ltd. | |||||||
| 著者版フラグ | ||||||||
| 出版タイプ | AM | |||||||
| 出版タイプResource | http://purl.org/coar/version/c_ab4af688f83e57aa | |||||||
