Numerical simulation of electron energy loss near inhomogeneous dielectrics
- Departamento de CCIA, Facultad de Informatica, UPV/EHU, Apartado 649, 20080 San Sebastian (Spain)
- Departamento de Fisica de Materiales, Facultad de Quimica, UPV/EHU, Apartado 1072, 20080 San Sebastian (Spain)
The nonrelativistic energy loss suffered by fast electrons passing near dielectric interfaces of arbitrary shape is calculated by solving Poisson{close_quote}s equation using the boundary-charge method. The potential induced by a moving electron is expressed in terms of surface-charge distributions placed at the interfaces. These surface charges, obtained by self-consistently solving the resulting integral equation, act back on the electron producing a retarding force and hence energy loss. The dielectrics are described by frequency-dependent dielectric functions. Two particular cases are discussed in further detail: interfaces invariant under translation along one particular direction and axially symmetric interfaces. Previous results for simple geometries, such as planes, spheres, and cylinders, based upon analytical solutions, are fully reproduced within this approach. Calculations are presented for electrons moving near wedges, coupled parallel cylinders, coupled spheres, and toroidal surfaces. {copyright} {ital 1997} {ital The American Physical Society}
- OSTI ID:
- 554372
- Journal Information:
- Physical Review, B: Condensed Matter, Vol. 56, Issue 24; Other Information: PBD: Dec 1997
- Country of Publication:
- United States
- Language:
- English
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