Influence of Poisson's ratio uncertainty on calculations of the bowing parameter for strained InGaN layers
S. Stepanov, W.N.Wang
University of Bath
B.S.Yavich
University of Bath
and
Ioffe Physical-Technical Institute
V. Bougrov, Y.T.Rebane, Y.G.Shreter
Ioffe Physical-Technical Institute
This article was received on Friday, January 26, 2001 and
accepted on Thursday, March 8, 2001. Abstract
The
composition dependence of emission energy of pseudomorphically strained InGaN
layers with In content up to 0.2 is obtained. It is found that the main reason
of "scatter" in published values of the InGaN bowing parameter is
the uncertainty of the Poisson's ratio determination. It is shown that
after recalculation to the same Poisson's ratio, most published data
yield essentially the same results as compared to experimental
uncertainty.