Alfredo A. Correa edited untitled.tex  over 8 years ago

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\textbf{Abstract}   The We use  time-dependent density functional theory coupled with molecular dynamicsis used  to study electronic excitations produced by energetic protons ($\mathrm{H^+}$) in Cu solid $\mathrm{Cu}$  over a wide range of proton velocities. A plane-wave pseudopotential scheme is employed to solve the time-dependent Kohn-Sham equations for $\mathrm{H^+}$ and $\mathrm{Cu}$ crystal. These electronic excitations phenomena are used to study alter the  interatomic forces and electronic stopping powers due to both channeling and off-channeling trajectories. Our results are in qualitative agreement with \textsc{Srim} (Stopping and Range of Ions in Matter) database and models taking into account the channeling nature of our simulations.   Also these results unveil a region of superlinear velocity dependence related to copper crystalline band structure.   %You can get started by \textbf{double clicking} this text block and begin editing. You can also click the \textbf{Insert} button below to add new block elements. Or you can \textbf{drag and drop an image} right onto this text. Happy writing! The superlinear dependence is enhanced at lower electronic densities.