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Pressure-induced structural change in liquid GeI4
https://repo.qst.go.jp/records/48510
https://repo.qst.go.jp/records/4851025163327-7ce2-4ab1-a3c3-cdfa9120881b
| Item type | 学術雑誌論文 / Journal Article(1) | |||||
|---|---|---|---|---|---|---|
| 公開日 | 2018-02-15 | |||||
| タイトル | ||||||
| タイトル | Pressure-induced structural change in liquid GeI4 | |||||
| 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 | |||||
| アクセス権 | ||||||
| アクセス権 | metadata only access | |||||
| アクセス権URI | http://purl.org/coar/access_right/c_14cb | |||||
| 著者 |
Fuchizaki, Kazuhiro
× Fuchizaki, Kazuhiro× Nishimura, Hironori× Hase, Takaki× 齋藤, 寛之× 齋藤 寛之 |
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| 抄録 | ||||||
| 内容記述タイプ | Abstract | |||||
| 内容記述 | The similarity in the shape of the melting curve of GeI4 to that of SnI4 suggests that a liquid–liquid transition as observed in liquid SnI4 is also expected to occur in liquid GeI4. Because the slope of the melting curve of GeI4 abruptly changes at around 3 GPa, in situ synchrotron diffraction measurements were conducted to examine closely the structural changes upon compression at around 3 GPa. The reduced radial distribution functions of the high- and low-pressure liquid states of GeI4 share the same feature inherent in the high-pressure (highdensity) and low-pressure (low-density) radial distribution functions of liquid SnI4. This feature allows us to introduce local order parameters that we may use to observe the transition. Unlike the transition in liquid SnI4, the transition from the low-pressure to the high-pressure structure seems sluggish. We speculate that the liquid–liquid critical point of GeI4 is no longer a thermodynamically stable state and is slightly located below the melting curve. As a result, the structural change is said to be a crossover rather than a transition. The behavior of the local-order parameters implies a metastable extension of the liquid–liquid phase boundary with a negative slope. | |||||
| 書誌情報 |
Journal of Physics: Condensed Matter 巻 30, 号 4, p. 045401-1-045401-9, 発行日 2018-01 |
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| 出版者 | ||||||
| 出版者 | IOP Publishing | |||||
| DOI | ||||||
| 識別子タイプ | DOI | |||||
| 関連識別子 | 10.1088/1361-648X/aaa180 | |||||
