關鍵字查詢 | 類別:期刊論文 | | 關鍵字:Dislocation-mediated Healing of Ideal and Adsorbed Monolayers with Vacancy Damage

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1 83/1 物理系 周子聰 教授 期刊論文 發佈 Dislocation-mediated Healing of Ideal and Adsorbed Monolayers with Vacancy Damage , [83-1] :Dislocation-mediated Healing of Ideal and Adsorbed Monolayers with Vacancy Damage期刊論文Dislocation-mediated Healing of Ideal and Adsorbed Monolayers with Vacancy DamageJoós, Béla; Zhou, Zicong; Duesbery, M.S.淡江大學物理學系College Park: American Physical SocietyPhysical Review B (Condensed Matter) 50(12), pp.8763-8772A spontaneous self-healing mechanism, called dislocation-mediated healing (DMH), is demonstrated by molecular-dynamics simulation in ideal (i.e., constrained in two dimensions) and adsorbed monolayers. The self-healing involves a rapid condensation of the vacancies into dislocation dipoles. It is complete at temperatures above the self-diffusion temperature. An associated collapse of the shear modulus similar to the Kosterlitz-Thouless dipole dissociation is observed for high vacancy concentrations. The phenomenon is observed in monolayers with a long-range interparticle interaction and is more effective as the mobility of the vacancies increases. In Lennard-Jones monolayers (LJM's
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