Hole transport in p-channel Si MOSFETs
Using a Monte Carlo method, we investigate hole transport in ultrasmall p-channel Si MOSFETs with gate lengths of 25nm. The device simulator couples a 2D Poisson solver with a discretized 66 kp Hamiltonian solver that handles the valence band-structure and includes the effect of the confining potential under the gate, thereby providing the subband structure in the channel region. Carriers in the source and drain regions are treated as quasi-3D particles and the band-structure information is included by solving for the eigenenergies of a more compact 66 kp Hamiltonian. It is seen that band-structure calculations are needed in order to describe accurately the high field transport in ultrasmall nano-scale MOSFETs.
hole transport valence band-structure 2d monte carlo six band kp