deletions | additions       diff --git a/figures/force_xyz_dxn/caption.tex b/figures/force_xyz_dxn/caption.tex  index d042ab8..0c1f738 100644  --- a/figures/force_xyz_dxn/caption.tex  +++ b/figures/force_xyz_dxn/caption.tex 
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\label{fig:force_on_proton} (color online).   Proton in Copper: Force on proton moving with $v = 1.8 ~\mathrm{a.u.}$ as a function of traveled distance.   Where red, black and blue lines denotes $x$, $y$ and $z$ directions respectively along the [100] channeling trajectory.   Note distance.%   %Note  that the force in the direction of the velocity (solid green) does not average to zero, the average (negative) value agrees with the stopping power calculated from the energy increase (Fig.~). Note that there is transient effect at first ($\lesssim 5~a_0$), then the projectile reenters in the periodic supercell ($\gtrsim 20.46~a_0$). The consistency between energy slope and drag force is discussed in Ref. \cite{Schleife_2015} %  %Where red, black and blue lines denotes $x$, $y$ and $z$ directions respectively along the [100] channeling trajectory.%