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Edwin E. Quashie edited untitled.tex
over 8 years ago
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\textbf{Abstract}
We use The time-dependent density functional theory coupled with molecular dynamics
is used to study electronic excitations produced by energetic protons ($\mathrm{H^+}$) in 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 a moving
$\mathrm{H^+}$ ion in the
$Cu$ 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 trajectories results are in quantitative agreement with
experiments (for off-channeling trajectories) the channeling nature of our simulations. experiments.
Also
these present results unveil a region of superlinear velocity dependence related to copper crystalline band structure.