The quantum mechanical phenomenon of tunneling time has been the subject of much debate. We use a Wigner function description of a Guassian wave packet to study the tunneling process. By adjusting the parameters of the barrier and wave packet, a variety of cases can be studied. For the multiple barrier case, the tunneling time shows peaks at energies corresponding to resonant states of the system. This charge storage within the well is also found to be significant in studying the resonant tunneling diode, giving rise to kinks in the negative differential conductivity region of the I-V characteristic.
ASJC Scopus subject areas
- Materials Science(all)
- Condensed Matter Physics
- Electrical and Electronic Engineering