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论文类型：期刊论文

发表时间：2008-08-01

发表刊物：CHINESE PHYSICS LETTERS

收录刊物：SCIE、ISTIC、Scopus

卷号：25

期号：8

页面范围：2981-2984

ISSN号：0256-307X

摘要：By using the linearized quantum hydrodynamic (QHD) theory, electronic excitations induced by a charged particle moving between or over two parallel two-dimensional quantum electron gases (2DQEG) are investigated. The calculation shows that the influence of the quantum effects on the interaction process should be taken into account. Including the quantum statistical and quantum diffraction effects, the general expressions of the induced potential and the stopping power are obtained. Our simulation results indicate that a V-shaped oscillatory wake potential exists in the electron gases during the test charge intrusion. Meanwhile, double peaks will occur in the stopping power when the distance of two surfaces is smaller and the test charge gets closer to any one of the two sheets.