Relaxation Time of High-Density Amorphous Ice

被引：37

作者：

Handle, Philip H. ^{[1
]}

Seidl, Markus ^{[1
]}

Loerting, Thomas ^{[1
]}

机构：

[1] Univ Innsbruck, Inst Phys Chem, A-6020 Innsbruck, Austria

来源：

PHYSICAL REVIEW LETTERS | 2012年 / 108卷 / 22期

基金：

欧洲研究理事会;

关键词：

1ST-ORDER TRANSITION; LIQUID TRANSITION; AMORPHIZATION; KINETICS; PHASES; WATER; GPA;

D O I：

10.1103/PhysRevLett.108.225901

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

Amorphous water plays a fundamental role in astrophysics, cryoelectron microscopy, hydration of matter, and our understanding of anomalous liquid water properties. Yet, the characteristics of the relaxation processes taking place in high-density amorphous ice (HDA) are unknown. We here reveal that the relaxation processes in HDA at 110-135 K at 0.1-0.2 GPa are of collective and global nature, resembling the alpha relaxation in glassy material. Measured relaxation times suggest liquid-like relaxation characteristics in the vicinity of the crystallization temperature at 145 K. By carefully relaxing pressurized HDA for several hours at 135 K, we produce a state that is closer to the ideal glass state than all HDA states discussed so far in literature.

引用

页数：4

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