Numerical gate capacitancevoltage characteristics and electronic structure of MBE silicon delta-FETs
New implementations of MBE growth techniques allow high accuracy in ?-doping profiles in silicon crystals. In this work we present a self-consistent numerical calculation of the electronic structure of ?-FETs, field effect transistors where the electric transport channel is a quasi-two-dimensional plan of antimonide doping in a silicon crystal. We made the calculations for the heavy and light electrons at 77 and 300 K, varying the gate voltage in devices with one to three coupled deltas. We obtain the effective potential, the subbands and respective electronic densities. We calculated DC-capacitances and free electron density spreadings which are related to device transconductance and performance.
silicon delta-fet delta-doping capacitance