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Edwin E. Quashie edited Each_simulation_of_the_ion__.tex
almost 8 years ago
Commit id: 0c8db245e75a20924154892e7f358bbe0d649e99
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Since the larger size effects are negligible this calculation used $(3\times3\times3)$ conventional cells containing $108$ host $\mathrm{Cu}$ atoms and $\mathrm{H^+}$.
% also represented by a Troullier-Martins pseudopotential ($17$ valence electrons per copper atom are explicitly considered).
To integrate the Brillouin zone a single $k$-point ($\Gamma$) was used.
The basis set is sampled with a $130~\mathrm{Ry}$ energy cutoff.
We
also tested for k-point convergence in a $(3\times3\times3)$ Morkost-Pack grid
(for the 108-supercell), that would be equivalent to a 2916
($108\times 27$ simulation cell of an hypothetical periodic system, including replicas of the proton), for a selected velocities with negligible differences of
0.08\%. 0.08\%
The projectile $\mathrm{H^+}$ is initially placed in the crystal and a time-\emph{independent} DFT calculation was completed to obtain the converged ground state results that are required for subsequent evolution.
We then perform TDDFT calculations on the electronic system with the moving proton.