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Alfredo A. Correa edited We_observe_in_Fig_ref__.tex
over 8 years ago
Commit id: 7972805b487f5763c2890ffe8b0937d148685875
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\end{equation}
(which assumes a proton effective charge of $Z_1 = 1$).
As shown in Fig.~\ref{fig:log_stopping_power}, for $v < 0.07~\mathrm{a.u.}$ the response of the effective electron gas with one electron per $\mathrm{Cu}$ mimics the TDDFT results.
The resulting curves
shown in Fig.~\ref{fig:log_stopping_power} shows that for $v > 0.3~\mathrm{a.u.}$ at least the $11$ electrons per atom (full valence) participates in the stopping electron gas within linear response.
We observe a $S_\text{e}$ kink around $v\sim 0.07~\mathrm{a.u.}$ due to a mixture of $\mathrm{d}$-band in the electronic density of states.
Similarly, our new results for $v \leq 0.07~\mathrm{a.u.}$, are primarily due to $\mathrm{s}$-band electrons within linear response.
In the simulation we directly show a crossover region between the two linear regimes, and we find that the friction is in direct relation to the velocity with a power law with exponent $1.455$.