Predicted elastic constants and critical layer thicknesses for cubic phase AlN, GaN, and InN on. beta. -SiC

Journal Article · Sat Jun 15 04:00:00 EDT 1991 · Journal of Applied Physics; (USA)

DOI:https://doi.org/10.1063/1.347412· OSTI ID:5536174

Sherwin, M E ^[1]; Drummond, T J ^[2]

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1. Department of Electrical Engineering and Computer Science, University of Michigan, Ann Arbor, Michigan 48109-2122 (USA)
2. Sandia National Laboratories, P.O. Box 5800, Albuquerque, New Mexico 87185 (USA)

Elastic constants for zinc-blende AlN, GaN, and InN have been estimated from the elastic constants of the wurtzite phase. This has been accomplished by recognizing that the crystal structures of the wurtzite and zinc-blende phases are related by a simple rotation. This rotation was then applied to the elastic constants and a least-squares fit is used to match the results. Using the zinc-blende elastic constants the critical thickness of the nitrides on {beta}-SiC substrates was calculated. The critical thickness of a single overlayer of AlN was calculated to be 14.1 nm, and for GaN the critical thickness was found to be 0.7 nm. In the elastic continuum model used there was no solution for the critical thickness of InN.

• DOE Contract Number: AC04-76DP00789
• OSTI ID: 5536174
• Journal Information: Journal of Applied Physics; (USA), Journal Name: Journal of Applied Physics; (USA) Vol. 69:12; ISSN 0021-8979; ISSN JAPIA
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
360203 -- Ceramics
Cermets
& Refractories-- Mechanical Properties
656002* -- Condensed Matter Physics-- General Techniques in Condensed Matter-- (1987-)
75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
ALUMINIUM COMPOUNDS
ALUMINIUM NITRIDES
CARBIDES
CARBON COMPOUNDS
DIMENSIONS
ELASTICITY
GALLIUM COMPOUNDS
GALLIUM NITRIDES
INDIUM COMPOUNDS
INDIUM NITRIDES
LATTICE PARAMETERS
LAYERS
MECHANICAL PROPERTIES
MINERALS
NITRIDES
NITROGEN COMPOUNDS
PNICTIDES
POISSON RATIO
SILICON CARBIDES
SILICON COMPOUNDS
SPHALERITE
SULFIDE MINERALS
TENSILE PROPERTIES
THICKNESS