arXiv subjects

Petrica I. Cristea

Publications and source records attributed to Petrica I. Cristea.

2 recordsLinked to original sources

arXiv2000

Resonant tunneling in GaAs/AlGaAs triple-barrier structures under uniform transverse magnetic field

The effect of an in-plane magnetic field on resonant tunneling in a symmetric GaAs/AlYGa1-YAs triple-barrier resonant tunneling TBRT structure is presented. The splitting of the resonant lines (and hence the coupling energy vs. magnetic induction) for the ground and the first excited resonant doublet shifts up in energy by increasing the magnetic induction. Each of branches in the resonant dispersion relations shows a parabolic behavior with the location of the cyclotron orbit center. It is expected that, at very high fields, the interaction with confined phonons be enhanced, due to phonon coupling between electron states in the ground quasibound doublet.

cond-mat.mes-hall↗

arXiv2000

Analytical Charge-Control Model for DH-HEMT

A new and simple analytical charge-control model of the two-dimensional electron gas of a double-heterojunction AlGaAs/GaAs/AlGaAs HEMT is described. It is found that, despite its simplicity, the charge-control model gives an accurate description of the device operation for a wide range of physical parameters. The validity of the analytical model is supported by the calculated results of the self-consistent quantum mechanical model and agrees with previously reported theoretical and experimental data. The influence of some physical parameters on the device performance is also discussed.

cond-mat.mes-hall↗