M. Kudo et al., IMPROVED HOLE TRANSPORT-PROPERTIES OF HIGHLY STRAINED IN0.35GA0.65AS CHANNEL DOUBLE-MODULATION-DOPED STRUCTURES GROWN BY MBE ON GAAS, Journal of crystal growth, 175, 1997, pp. 910-914
Hole transport properties have been improved by using highly strained
In0.35Ga0.65As channel double-modulation-doped heterostructures grown
by molecular beam epitaxy. This structure provided both a high mobilit
y of 354 cm(2)/(V s) and a high sheet hole concentration of 1.23 x 10(
12) cm(-2) at room temperature. Double-modulation-doped field effect t
ransistors with a 0.4-mu m gate length and a 20-mu m gate width were f
abricated. Transconductance of 118 mS/mm, which is about 1.5 times hig
her than that of single-modulation-doped field-effect transistors, was
obtained at room temperature.