K. Zekentes et al., MATERIALS PROBLEMS FOR THE DEVELOPMENT OF INGAAS INALAS HEMT TECHNOLOGY, Materials science & engineering. B, Solid-state materials for advanced technology, 20(1-2), 1993, pp. 21-25
The materials problems in the InGa1-xAs/In0.52Al0.48As on InP(001) sys
tem, which potentially affect the performance, reproducibility and sta
bility of high electron mobility transistor (HEMT) devices, have been
investigated. It is shown that crystalline imperfections and InAlAs gr
owth roughness strongly affect the InGaAs/InAlAs heterostructures. A c
orrelation between the structural and optical properties of InAlAs was
shown. The strained InxGa1-xAs channel is shown to enhance HEMT trans
port properties for x = 0.60 and channel thickness less than 25 nm.