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The core structures and mobility of ⟨c⟩ dislocations in magnesium were predicted using both density functional theory and molecular dynamics simulations. The pure edge and screw cores are compact at 0K. With increasing temperature up to 700K, the edge dislocation dissociates into two ⟨c⟩/2 partials on the basal plane, but remains immobile. The screw dislocation remains compact and continuously cross-slips...
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