Interactions of charged particle beams with double-layered two-dimensional quantum electron gases

被引：7
作者：
Li, Chun-Zhi [1 ]
Wang, You-Nian [2 ]
Song, Yuan-Hong [2 ]
Miskovic, Zoran L. [3 ,4 ]
机构：
[1] Inner Mongolia Univ Nationalities, Coll Phys & Elect Informat, Tongliao 028043, Peoples R China
[2] Dalian Univ Technol, Sch Phys & Optoelect Technol, Dalian 116023, Peoples R China
[3] Univ Waterloo, Dept Appl Math, Waterloo, ON N2L 3G1, Canada
[4] Univ Waterloo, Waterloo Inst Nanotechnol, Waterloo, ON N2L 3G1, Canada
来源：
PHYSICS LETTERS A | 2014年 / 378卷 / 22-23期
基金：
中国国家自然科学基金; 加拿大自然科学与工程研究理事会;
关键词：
CARBON NANOTUBES; FAST IONS; DYNAMIC INTERACTIONS; GRAPHENE; ELECTRODYNAMICS; SYSTEMS; MODEL;
D O I：
10.1016/j.physleta.2014.04.007
中图分类号：
O4 [物理学];
学科分类号：
0702 ;
摘要：
We investigate the interactions of external charged particles with a double-layered two-dimensional quantum electron gas (2DQEG), describing its collective or plasmon excitations by using the linearized quantum hydrodynamic (QHD) model. General expressions are derived for electron densities in the two layers, the induced potential, and the stopping and image forces on an external charged particle. Our calculations indicate that an oscillatory wake effect arises in the induced potential for a particle moving parallel the 2DQEG layers. In addition, double peaks are found in the stopping and image forces due to plasmon hybridization between the two 2DQEG layers. Finally, the induced number density in the double-layered 2DQEG is compared with the case of a single-layer 2DQEG supported by an insulating substrate. (C) 2014 Elsevier B.V. All rights reserved.
引用
收藏
页码：1626 / 1631
页数：6
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