Lots of effort have been devoted to the interactions of moving charged particles with matter, including the electronic stopping power, wake effects and charge exchange, keeping track of the pioneering work of Ritchie^[1]. Especially, investigations of the interaction of ions with nano-structured materials or electronics at the nanoscale have attracted much attention in recent years, since significant progresses have been achieved in the quantum electronic systems and nanoelectronic devices.

In this work, in the framework of the quantum hydrodynamic model (QHD), which is developed by solving the nonlinear Schödinger-Poisson or the Wigner-Poisson kinetic models^[2,3], we develop a theoretical model to describe a charged particle moving outside a metal nanosphere. Genereal expressions of the induced potential of the electrons in the nanosphere and the stopping power of the particle are obtained in spherical coordinates systems, as functions of the projectile velocity. The dependence of the stopping power on the particle velocity and position, the sphere radius and density parameter are discussed.

 

Supported by the National Natural Science Foundation of China (No.10975028), National Basic Research Program of China (No. 2010CB832901) and Program for New Century Excellent Talents in University (NCET-08-0073).

 

[1]R.H. Ritchie, Phys. Rev. 106 (1957) 874.

[2]F. Haas, G. Manfredi, M. Feix, Phys. Rev. E62 (2000) 2763.

[3]G. Manfredi, F. Haas, Phys. Rev. B64 (2001) 075316.

Yan-Xia Wang, School of Physics and Optoelectronic Technology, Dalian University of Technology, China
Yuan-Hong Song*, School of Physics and Optoelectronic Technology, Dalian University of Technology, China
You-Nian Wang, School of Physics and Optoelectronic Technology, Dalian University of Technology, China

*presenting author