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Interactions of a Charged Particle with Parallel Two-Dimensional Quantum Electron Gases |
| LI Chun-Zhi1,2, SONG Yuan-Hong1, WANG You-Nian1 |
| 1The State Key Laboratory of Materials Modification, School of Physics and Optoelectronic Technology, Dalian University of Technology, Dalian 1160232College of Physics and Electronic Information, Inner Mongolia University for the Nationalities, Tongliao 028043 |
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| Cite this article: |
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LI Chun-Zhi, SONG Yuan-Hong, WANG You-Nian 2008 Chin. Phys. Lett. 25 2981-2984 |
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Abstract 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.
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71.10.Ca
05.60.Gg
34.50.Bw
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Received: 21 April 2008
Published: 25 July 2008
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