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Indexed by:期刊论文

Date of Publication:2010-02-15

Journal:APPLIED PHYSICS LETTERS

Included Journals:SCIE、EI

Volume:96

Issue:7

ISSN No.:0003-6951

Key Words:epitaxial growth; ionisation potential; Monte Carlo methods; nanofabrication; nanostructured materials; self-assembly; surface morphology

Abstract:Recent experiments have demonstrated that well-ordered one-dimensional column nanostructures can be formed via self-assembly in a variety of two-component epitaxial systems, including diluted magnetic semiconductors and high-T(C) superconductors. Here we use kinetic Monte Carlo simulations based on a (1+1)-dimensional lattice model to study the morphological evolution of strain-free two-component films during epitaxial growth in the nonequilibrium kinetic regime. Our simulations show that columnlike nanostructures are only formed in the system when the interatomic bond energies E(AA), E(BB), and E(AB) satisfy the inequality of E(AB)<(E(AA)+E(BB))/2 at sufficiently high growth temperatures and low deposition rates.