Effect of magnetic field on the velocity autocorrelation and the caging of particles in two-dimensional Yukawa liquids

被引：32

作者：

Dzhumagulova, K. N. ^{[1
]}

Masheeva, R. U. ^{[1
]}

Ramazanov, T. S. ^{[1
]}

Donko, Z. ^{[2
]}

机构：

[1] Al Farabi Kazakh Natl Univ, IETP, Alma Ata 050040, Kazakhstan

[2] Hungarian Acad Sci, Wigner Res Ctr Phys, Inst Solid State Phys & Opt, H-1121 Budapest, Hungary

来源：

PHYSICAL REVIEW E | 2014年 / 89卷 / 03期

关键词：

MOLECULAR-DYNAMICS SIMULATIONS; SHEAR VISCOSITY; COULOMB CRYSTALLIZATION; DUSTY PLASMA; DIFFUSION; CRYSTAL; WAVES; COMPONENT; SYSTEMS; LATTICE;

D O I：

10.1103/PhysRevE.89.033104

中图分类号：

O35 [流体力学]; O53 [等离子体物理学];

学科分类号：

070204 ; 080103 ; 080704 ;

摘要：

We investigate the effect of an external magnetic field on the velocity autocorrelation function and the "caging" of the particles in a two-dimensional strongly coupled Yukawa liquid, via numerical simulations. The influence of the coupling strength on the position of the dominant peak in the frequency spectrum of the velocity autocorrelation function confirms the onset of a joint effect of the magnetic field and strong correlations at high coupling. Our molecular dynamics simulations quantify the decorrelation of the particles' surroundings: the magnetic field is found to increase significantly the caging time, which reaches values well beyond the time scale of plasma oscillations. The observation of the increased caging time is in accordance with findings that the magnetic field decreases diffusion in similar systems.

引用

页数：7

共 54 条

[1] Structural and dynamical properties of Yukawa balls [J].

Block, D. ;

Kroll, M. ;

Piel, A. ;

Kaeding, S. ;

Ivanov, Y. ;

Melzer, A. ;

Henning, C. ;

Baumgartner, H. ;

Ludwig, P. ;

Bonitz, M. .

PLASMA PHYSICS AND CONTROLLED FUSION, 2007, 49 (12B) :B109-B116

[2] Magnetized strongly coupled plasmas and how to realize them in a dusty plasma setup [J].

Bonitz, M. ;

Kaehlert, H. ;

Ott, T. ;

Loewen, H. .

PLASMA SOURCES SCIENCE & TECHNOLOGY, 2013, 22 (01)

[3] Nonlinear Magnetoplasmons in Strongly Coupled Yukawa Plasmas [J].

Bonitz, M. ;

Donko, Z. ;

Ott, T. ;

Kaehlert, H. ;

Hartmann, P. .

PHYSICAL REVIEW LETTERS, 2010, 105 (05)

[4]

Bonitz M., 2010, SPRINGER SERIES IN A, V59

[5] DIRECT OBSERVATION OF COULOMB CRYSTALS AND LIQUIDS IN STRONGLY COUPLED RF DUSTY PLASMAS [J].

CHU, JH ;

I, L .

PHYSICAL REVIEW LETTERS, 1994, 72 (25) :4009-4012

[6] Liquid-state properties of a one-component plasma - art. no. 065003 [J].

Daligault, J .

PHYSICAL REVIEW LETTERS, 2006, 96 (06)

[7] Molecular dynamics simulations of strongly coupled plasmas:: Localization and microscopic dynamics [J].

Donkó, Z ;

Hartmann, P ;

Kalman, GJ .

PHYSICS OF PLASMAS, 2003, 10 (05) :1563-1568

[8] Dynamical correlations and collective excitations of Yukawa liquids [J].

Donko, Z. ;

Kalman, G. J. ;

Hartmann, P. .

JOURNAL OF PHYSICS-CONDENSED MATTER, 2008, 20 (41)

[9] Shear viscosity of strongly coupled Yukawa liquids [J].

Donko, Z. ;

Hartmann, P. .

PHYSICAL REVIEW E, 2008, 78 (02)

[10] Time-correlation functions and transport coefficients of two-dimensional Yukawa liquids [J].

Donko, Z. ;

Goree, J. ;

Hartmann, P. ;

Liu, Bin .

PHYSICAL REVIEW E, 2009, 79 (02)

← 1 2 3 4 5 6 →