WEKO3
アイテム
A Theory of Phonon-Like Excitations in Non-Crystalline Solids and Liquids
http://hdl.handle.net/10191/4895
http://hdl.handle.net/10191/4895b1cece48-4992-4bc0-8774-f70965ec6dcb
名前 / ファイル | ライセンス | アクション |
---|---|---|
PTP47(1972)3.pdf (1.7 MB)
|
|
Item type | 学術雑誌論文 / Journal Article(1) | |||||
---|---|---|---|---|---|---|
公開日 | 2007-06-29 | |||||
タイトル | ||||||
タイトル | A Theory of Phonon-Like Excitations in Non-Crystalline Solids and Liquids | |||||
タイトル | ||||||
言語 | en | |||||
タイトル | A Theory of Phonon-Like Excitations in Non-Crystalline Solids and Liquids | |||||
言語 | ||||||
言語 | eng | |||||
資源タイプ | ||||||
資源 | http://purl.org/coar/resource_type/c_6501 | |||||
タイプ | journal article | |||||
著者 |
Takeno, Shozo
× Takeno, Shozo× Goda, Masaki |
|||||
著者別名 | ||||||
識別子 | 37755 | |||||
識別子Scheme | WEKO | |||||
姓名 | 合田, 正毅 | |||||
抄録 | ||||||
内容記述タイプ | Abstract | |||||
内容記述 | Elementary excitations associated with atomic motion in non-crystalline solids and liquids are studied with particular attention paid to the dependence of their dispersion on local order. In doing this, an attempt is made to obtain an exact formal expression for an effective dynamical matrix giving the eigenfrequencies of phonons in a non-crystalline solid in terms of “effective pair-correlation functions”. A brief remark is also given on the moment method and sum rules for the dynamic structure factor to study high-frequency collective motion in liquids. It is suggested that under certain restrictions the phonon-roton-like behavior of excitations as observed in liquid helium is likely to exist in almost all types of structure or topological disorder systems (amorphous and glassy solids, liquids, etc.). To substantiate this, a model one-dimensional system is chosen to show how a phonon dispersion curve in a crystal lattice is modified, as the partial disorder characterizing a structure disorder system is introduced. Such a local disorder is shown to give rise to a frequency gap which decreases with increasing local order and eventually vanishes in the case of complete order. This result is also in qualitaive agreement with the pressure- and the temperature-dependence of the roton minimum energy in liquid helium. Simple numerical calculations are made to compare the obtained results with experiments for collective motion in liquid argon and also in liquid helium. Fairly good agreement is obtained. | |||||
書誌情報 |
Progress of theoretical physics en : Progress of theoretical physics 巻 47, 号 3, p. 790-806, 発行日 1972-03 |
|||||
出版者 | ||||||
出版者 | Progress of Theoretical Physics | |||||
ISSN | ||||||
収録物識別子タイプ | ISSN | |||||
収録物識別子 | 13474081 | |||||
書誌レコードID | ||||||
収録物識別子タイプ | NCID | |||||
収録物識別子 | AA00791455 | |||||
DOI | ||||||
識別子タイプ | DOI | |||||
関連識別子 | info:doi/10.1143/PTP.47.790 | |||||
著者版フラグ | ||||||
値 | publisher |