SURFACE MELTING OF ICE I(H) SINGLE-CRYSTALS REVEALED BY GLANCING ANGLE X-RAY-SCATTERING

被引：115

作者：

LIED, A

DOSCH, H

BILGRAM, JH

机构：

[1] INST MAX VON LAUE PAUL LANGEVIN,F-38042 GRENOBLE,FRANCE

[2] SWISS FED INST TECHNOL,INST FESTKORPERPHYS,CH-8093 ZURICH,SWITZERLAND

来源：

PHYSICAL REVIEW LETTERS | 1994年 / 72卷 / 22期

关键词：

D O I：

10.1103/PhysRevLett.72.3554

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

We present glancing angle x-ray scattering experiments at [00.1], [10.0], and [11.0] surfaces of ice I(h) single crystals. The temperature dependence of the evanescent Bragg scattering upon heating reveals a quasiliquid surface layer well below the melting point on each investigated ice surface. At [10.0] and [11.0] surfaces, thermal faceting is observed, which is briefly discussed. The ''oxygen-forbidden'' (00.4) Bragg profiles which give direct access to hydrogen long-range order have been investigated in the bulk and close to the surface. Although in the bulk the (00.4) width is resolution limited, we discovered prior to surface melting a strong rotational disorder of the hydrogen bonds within a mesoscopic surface sheet.

引用

页码：3554 / 3557

页数：4

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