Heterogeneous nucleation of coherently strained islands during epitaxial growth of Ge on Si(110)
作者:
M. Krishnamurthy,
Bi-Ke Yang,
J. D. Weil,
C. G. Slough,
期刊:
Applied Physics Letters
(AIP Available online 1997)
卷期:
Volume 70,
issue 1
页码: 49-51
ISSN:0003-6951
年代: 1997
DOI:10.1063/1.119301
出版商: AIP
数据来源: AIP
摘要:
We report on the molecular beam epitaxial growth of Ge on Si(110) surfaces. High temperature cleaning (oxide desorption) results in the formation of shallow faceted pits distributed randomly on the Si(110) surface. Deposition of Ge at temperatures between 600 and 725 °C leads to preferential nucleation along the pit edges forming elongated islands, which subsequently grow to compact three-dimensional coherent islands. The observation of strained islands in close proximity to each other offers insights into their nucleation behavior and strain relaxation. Our observations suggest heterogeneous nucleation as a possible method for fabricating assemblies of quantum dots. ©1997 American Institute of Physics.
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