Dynamic criteria for melting in two dimensions

被引：284

作者：

Zahn, K ^{[1
]}

Maret, G ^{[1
]}

机构：

[1] Univ Konstanz, Fachbereich Phys, D-78457 Constance, Germany

来源：

PHYSICAL REVIEW LETTERS | 2000年 / 85卷 / 17期

关键词：

D O I：

10.1103/PhysRevLett.85.3656

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

The two-dimensional (2D) melting transition is analyzed on the basis of the long-time behavior of a modified Lindemann parameter in 2D gamma (L)(t) and the bond-angular correlation function g(6)(t). Using video microscopy complete positional data are obtained over five decades in time for an ensemble of superparamagnetic colloidal particles confined to an air-water interface. We find that each of the three phases (solid/hexatic/isotropic liquid) is uniquely characterized by the long-time behavior of gamma (L)(t), g(6)(t), and the non-Gaussian parameter of the relative neighbor-neighbor displacement.

引用

页码：3656 / 3659

页数：4

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