Collective excitations of a system of coupled relativistic and nonrelativistic two-dimensional electron gases

被引：3
|
作者：
Balram, Ajit C. [1 ]
Hutasoit, Jimmy A. [1 ]
Jain, Jainendra K. [1 ]
机构：
[1] Penn State Univ, Dept Phys, University Pk, PA 16802 USA
来源：
PHYSICAL REVIEW B | 2014年 / 90卷 / 04期
关键词：
TOPOLOGICAL INSULATOR; PLASMONS; SURFACE;
D O I：
10.1103/PhysRevB.90.045103
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
We study collective excitations of a two-dimensional electron system consisting of two kinds of charge carriers: relativistic or Dirac electrons with linear dispersion and nonrelativistic electrons with parabolic dispersion. We find that the strength of the interaction between the different charge carriers, i.e., the interspecies interaction, plays a significant role in determining the number of plasmon modes as well as their dispersions in certain parameter regimes.
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页数：7
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