X. Letartre et al., Influence of strain compensation on structural and electrical properties of InAlAs/InGaAs HEMT structures grown on InP, JPN J A P 1, 38(2B), 1999, pp. 1169-1173
Strain-compensated InAlAs/lnGaAs HEMT structures, grown on InP substrate, h
ave been investigated in terms of structural and electrical properties. Fro
m detailed x-ray diffraction (XRD) investigations the compensation index an
d the evolution of the strain state were measured. We show that a partial a
nd controlled strain compensation significantly improves the structural qua
lity and the thermal stability of HEMT structures as well as their electric
al properties.