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2004 | 105 | 6 | 559-566
Article title

Pressure Dependence of Elastic Constants in Zinc-Blende III-N and Their Influence on the Light Emission in Nitride Heterostructures

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Languages of publication
EN
Abstracts
EN
We studied the nonlinear elasticity effects for the case of III-N compounds. Particularly, we determined the pressure dependences of elastic constants, in zinc-blende InN, GaN, and AlN by performing ab initio calculations in the framework of plane-wave pseudopotential implementation of the density-functional theory. We found significant and almost linear increase in C_{11}, C_{12} with pressure for considered nitrides compounds. Much weaker dependence on pressure was observed for C_{44}. We also discussed pressure dependences of two-dimensional Poisson's ratio and elastic anisotropy coefficient. Finally, we showed that the pressure dependence of elastic constants results in significant reduction of the pressure coefficient of the energy emission in cubic InGaN/GaN quantum wells and essentially improves the agreement between experimental and theoretical values.
Keywords
EN
Year
Volume
105
Issue
6
Pages
559-566
Physical description
Dates
published
2004-06
received
2004-05-28
References
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Document Type
Publication order reference
YADDA identifier
bwmeta1.element.bwnjournal-article-appv105n619kz
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