A de Bernabé et al 1999 J. Phys.: Condens. Matter 11 L323 doi:10.1088/0953-8984/11/28/102
Elastic constants of InxGa1-xAs and InxGa1-xP determined using surface acoustic waves
A de Bernabé
, C Prieto, L González
, Y González and A G Every§
LETTER TO THE EDITOR
The elastic constant tensors of thin layers of InxGa1-xAs and InxGa1-xP with compositions around x = 0.5 have been determined using surface acoustic waves measured by Brillouin light scattering spectroscopy. Contrary to the case for the usual estimates, the experimentally obtained elastic constants are different from the ones calculated by simple linear combination of those of the corresponding constituent binary compounds. An averaging model combining a parallel-serial disposition of springs with the elastic constants corresponding to the binary compounds has been used to explain the elastic constants of the ternary alloys. This model explains perfectly the elastic properties of the InxGa1-xAs system, while those of the InxGa1-xP system are not reproduced.
- PACS
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68.60.Bs Mechanical and acoustical properties
81.40.Jj Elasticity and anelasticity, stress-strain relations
78.35.+c Brillouin and Rayleigh scattering; other light scattering
- Subjects
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Condensed matter: electrical, magnetic and optical
- Dates
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Issue 28 (19 July 1999)
Received 7 April 1999, in final form 9 June 1999
-
Elastic constants of InxGa1-xAs and InxGa1-xP determined using surface acoustic waves
A de Bernabé et al 1999 J. Phys.: Condens. Matter 11 L323
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