Magnetic Field Blocks Two-Dimensional Crystallization in Strongly Coupled Plasmas

被引：20

作者：

Ott, T. ^{[1
,2
]}

Loewen, H. ^{[1
]}

Bonitz, M. ^{[2
]}

机构：

[1] Univ Dusseldorf, Inst Theoret Phys Weiche Mat 2, D-40225 Dusseldorf, Germany

[2] Univ Kiel, Inst Theoret Phys & Astrophys, D-24098 Kiel, Germany

来源：

PHYSICAL REVIEW LETTERS | 2013年 / 111卷 / 06期

关键词：

2; DIMENSIONS; COLLOIDAL CRYSTALS; PHASE-TRANSITIONS; METASTABILITY;

D O I：

10.1103/PhysRevLett.111.065001

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

Crystallization in a two-dimensional strongly coupled plasma from a rapidly cooled fluid is found to be efficiently blocked by an external magnetic field. Beyond a threshold of the magnetic field strength B, the relaxation time to the equilibrium crystal increases exponentially with B, which is attributed to an impeded conversion of potential to kinetic energy. Our finding is opposed to the standard picture of two-dimensional freezing of one-component systems which does not exhibit a nucleation barrier and opens the way to keep two-dimensional fluids metastable over long times.

引用

页数：5