Large-amplitude thermal oscillations in defected, tilted nanocolumns
BC Hubartt and JG Amar, APPLIED PHYSICS LETTERS, 105, 193107 (2014).
We consider the thermomechanical properties of highly defected, tilted copper nanocolumns grown via simulations of glancing angle deposition. The large defect density and compressive strain lead to ultra-low activation energies for plastic deformation via collective shear motion. As a result, the thermal oscillation amplitude is independent of temperature. This leads to a mechanism for large-amplitude thermally induced nanocolumn oscillation, in which the dynamics corresponds to a sequence of correlated activated events. (C) 2014 AIP Publishing LLC.
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