DIELECTRIC TENSOR AND SHEAR-MODE DISPERSION FOR STRONGLY COUPLED COULOMB LIQUIDS - 2-DIMENSIONAL ELECTRON LIQUID

被引:30
作者
GOLDEN, KI
KALMAN, G
WYNS, P
机构
[1] BOSTON COLL, DEPT PHYS, CHESTNUT HILL, MA 02167 USA
[2] HEWLETT PACKARD CO, COLORADO INTEGRATED CIRCUITS DIV, FT COLLINS, CO 80525 USA
来源
PHYSICAL REVIEW A | 1992年 / 46卷 / 06期
关键词
D O I
10.1103/PhysRevA.46.3463
中图分类号
O43 [光学];
学科分类号
070207 ; 0803 ;
摘要
Similar to the three-dimensional (3D) one-component plasma (OCP), a two-dimensional (2D) OCP (electron film on the surface of liquid He, e.g.) can support transverse shear waves. We adapt the quasi-localized charge formalism of the preceding paper [Golden, Kalman, and Wyns, Phys. Rev. A 46, 3454 (1992)] to the analysis of the 2D transverse dielectric-response function and identify the shear mode, whose existence is unique to the strongly coupled system. We study the dispersion of the shear mode in the 22 < GAMMA < 120 domain (GAMMA = e2/ak(B)T, a is the 2D Wigner-Seitz radius) and compare it with the results of the molecular-dynamics simulations of Totsuji and Kakeya [Phys. Rev. A 22, 1220 (1980)]. Agreement between the theory and simulation results is quite satisfactory. We also establish the correspondence between the shear mode of the strongly coupled 2D OCP and the acoustic phonons of the 2D Wigner crystal.
引用
收藏
页码:3463 / 3470
页数:8
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