Indexed on: 29 Jun '12Published on: 29 Jun '12Published in: Journal of Electronic Materials
This paper presents an indium gallium arsenide (InGaAs) quantum dot gate field-effect transistor (QDG-FET) that exhibits an intermediate “i” state in addition to the conventional ON and OFF states. The QDG-FET utilized a II–VI gate insulator stack consisting of lattice-matched ZnSe/ZnS/ZnMgS/ZnS/ZnSe for its high-κ and wide-bandgap properties. Germanium oxide (GeOx)-cladded germanium quantum dots were self-assembled over the gate insulator stack, and they allow for the three-state behavior of the device. Electrical characteristics of the fabricated device are also presented.