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Alfredo A. Correa edited untitled.tex
over 8 years ago
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\textbf{Abstract}
Time-dependent density functional theory coupled with molecular dynamics is used to study electronic excitations produced by energetic protons
%($\mathrm{H^+}$)
in solid copper
%$\mathrm{Cu}$
over a wide range of proton velocities.
A plane-wave pseudopotential scheme is employed to solve the time-dependent Kohn-Sham equations for a moving ion
%$\mathrm{H^+}$ ion
in a periodic
%$\mathrm{Cu}$
crystal.
These electronic excitations determine the stopping power of the material and alter the interatomic forces for both channeling and off-channeling trajectories.
Our off-channeling results are in quantitative agreement with experiments.
Present results unveil a region of superlinear velocity dependence related to copper crystalline band structure.
