SHAPE AND STABILITY OF QUANTUM DOTS

Authors
PEHLKE E MOLL N KLEY A SCHEFFLER M
Citation
E. Pehlke et al., SHAPE AND STABILITY OF QUANTUM DOTS, Applied physics A: Materials science & processing, 65(6), 1997, pp. 525-534
Citations number
44
Journal title
Applied physics A: Materials science & processing → ACNP
ISSN journal
09478396
Volume
65
Issue
6
Year of publication
1997
Pages
525 - 534
Database
ISI
SICI code
0947-8396(1997)65:6<525:SASOQD>2.0.ZU;2-Y
Abstract
The formation of dislocation-free three-dimensional islands by heteroe pitaxial growth of lattice mismatched materials is utilized to produce partially ordered arrays of quantum dots. The equilibrium shape of th ese islands results from the competition between surface and elastic e nergies. We have studied the system InAs/GaAs(001) in detail. InAs sur face energies have been computed ab initio for several orientations, a nd the elastic energy of the islands has been calculated within a cont inuum theory. The resulting equilibrium islands are hills bounded by { 110}, {111}, and {(111) over bar} facets and a (001) surface on top. W e compare to experiment and discuss the influence of growth kinetics o n the shape.