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Step Bunching, Chemical Ordering, and Diffusivity in Si1−yCy Heteroepitaxy

Published online by Cambridge University Press:  10 February 2011

Frank Grosse ,
Edward T. Croke ,
Mark F. Gyureb ,
Margaret Floydc  and
David J. Smith
Frank Grosse*
Affiliation:
UCLA Department of Mathematics, Los Angeles, CA HRL Laboratories, Malibu, CA
Edward T. Croke
Affiliation:
UCLA Department of Mathematics, Los Angeles, CA
Mark F. Gyureb
Affiliation:
HRL Laboratories, Malibu, CA
Margaret Floydc
Affiliation:
Center for Solid State Science Arizona State University, Tempe, AZ
David J. Smith
Affiliation:
Center for Solid State Science Arizona State University, Tempe, AZ
*
Corresponding author. Contact information HRL Laboratories, 3011 Malibu Canyon Road, Malibu, CA 90265, USA. Tel.: +01 310 317 5778; fax: +01 310 317 5958; e-mail: fgrosse@math.ucla.edu
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Abstract

The growth of Si1−yCy on Si(001) and Si(118) surfaces is investigated experimentally and theoretically. A step instability is found on (118) surfaces leading to step bunching, under low C-concentrations. This behavior is explained by increased diffusivity of Si dimers in the vicinity of carbon. Self adjusting step bunches are found in kinetic Monte Carlo simulations with ordering of the carbon along nearly (001) planes. Experimental parameters (i.e., temperature, flux rate, and tilt angle of the substrate), which are controllable experimentally, can be used to adjust the length scale of the step bunching.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 618: Symposium K – Morphological & Compositional Evolution of Heteroepitaxial… , 2000 , 65
Copyright
Copyright © Materials Research Society 2000

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References

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