Edwin E. Quashie edited For_the_off_channeling_trajectory__.tex  about 8 years ago

Commit id: fb58fcf1bdd25949c223223a089baa6761654437

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For the off-channeling trajectory, the procedure for computing the $S_\text{e}$ is depicted in Fig. \ref{fig:fit_off_channel}. The direction of the velocities is [$0.704657, 0.609709, 0.362924$] (given normalized here).  The sharp peaks show when the proton is in the vicinity of a host $\mathrm{Cu}$ atom,   while the smaller peaks and flatter regions indicate that the proton is not very close to any host atom.   To obtain the $S_\text{e}$ we compute the slopes of the curves by a linear fit of the form $y = a + bx$ (black solid lines) using our data from $x > 5~a_0$ (to eliminate the transient region) to a given maximum position of $x$ determined by minimizing reentrancy in the periodic supercell into the initial position.