Schematic energy band model of the modulation doped GaN/AlGaN QW with a weak piezoelectric field across the well. Also shown are the confined states, and the suggested transitions involved are indicated by arrows. The Fermi energy is believed to lie close to the third electron subband in the QW. (The wavefunctions and energy positions of the confined states are from a calculation with a 165 keV/cm piezoelectric field across the QW.)
© 1999 The Materials Research Society
