Strained island formation in heteroepitaxy

Pao Yue-kong Library Electronic Theses Database

Strained island formation in heteroepitaxy


Author: Lee, Chun-kin
Title: Strained island formation in heteroepitaxy
Degree: M.Phil.
Year: 2002
Subject: Hong Kong Polytechnic University -- Dissertations
Crystal growth
Department: Dept. of Applied Physics
Pages: v, 50 leaves : ill. ; 30 cm
Language: English
InnoPac Record:
Abstract: Morphological evolution of strained heteroepitaxial films is studied using large scale kinetic Monte Carlo simulations in 1+1 dimensions. Films and substrates are modeled by square lattices of balls and springs representing atoms and elastic interactions respectively. We simulate surface diffusion using an activated hopping algorithm with the hopping rate of each surface atom followed from the coordination number and the strain energy. The repeated calculations of the strain energy is the most computationally intensive part of the simulation. We handle this efficiently using a novel Green's function technique closely related to the boundary integral method. Simulations of the morphological evolution during deposition or annealing are conducted. We observe formation of islands in both cases under a wide range of conditions. The resulting morphology resembles those of Si1-xGex films on Si(001) substrates at low misfits.

Files in this item

Files Size Format
b16677481.pdf 2.014Mb PDF
Copyright Undertaking
As a bona fide Library user, I declare that:
  1. I will abide by the rules and legal ordinances governing copyright regarding the use of the Database.
  2. I will use the Database for the purpose of my research or private study only and not for circulation or further reproduction or any other purpose.
  3. I agree to indemnify and hold the University harmless from and against any loss, damage, cost, liability or expenses arising from copyright infringement or unauthorized usage.
By downloading any item(s) listed above, you acknowledge that you have read and understood the copyright undertaking as stated above, and agree to be bound by all of its terms.


Quick Search


More Information