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Current-Induced Stabilization Of Surface Morphology In Stressed Solids, Dimitrios Maroudas, M. R. Gungor, V. Tomar
Current-Induced Stabilization Of Surface Morphology In Stressed Solids, Dimitrios Maroudas, M. R. Gungor, V. Tomar
Dimitrios Maroudas
We examine the surface morphological evolution of a conducting crystalline solid under the simultaneous action of an electric field and mechanical stress based on a fully nonlinear model and combining linear stability theory with self-consistent dynamical simulations. We demonstrate that electric current, through surface electromigration, can stabilize the surface morphology of the stressed solid against cracklike surface instabilities. The results also have more general implications for the morphological response of solid surfaces under the simultaneous action of multiple external forces.
Coarse Molecular-Dynamics Analysis Of An Order-To-Disorder Transformation Of A Krypton Monolayer On Graphite, Dimitrios Maroudas, I. G. Kevrekidis, V. A. Fonoberov, M. Arienti, M. A. Amat
Coarse Molecular-Dynamics Analysis Of An Order-To-Disorder Transformation Of A Krypton Monolayer On Graphite, Dimitrios Maroudas, I. G. Kevrekidis, V. A. Fonoberov, M. Arienti, M. A. Amat
Dimitrios Maroudas
The thermally induced order-to-disorder transition of a monolayer of krypton (Kr) atoms adsorbed on a graphite surface is studied based on a coarse molecular-dynamics (CMD) approach for the bracketing and location of the transition onset. A planar order parameter is identified as a coarse variable, ψ, that can describe the macroscopic state of the system. Implementation of the CMD method enables the construction of the underlying effective free-energy landscapes from which the transition temperature, Tt, is predicted. The CMD prediction of Tt is validated by comparison with predictions based on conventional molecular-dynamics (MD) techniques. The conventional MD computations include the …