Abstract
We present a theoretical study of electron transport in the resonant-tunneling diode under the effects of an in-plane magnetic field. We work in the Wigner formalism. We generalize the formalism to include effects of an in-plane magnetic field. The transport equation is derived for the Wigner distribution function. We solve for the function, from which the charge distribution and the tunnel current are calculated. Discussions of magnetic effects on electron tunneling are presented.