Interference oscillations of the acoustic phonon-assisted magnetotunneling in double quantum wells

Electron tunneling relaxation caused by acoustic phonon scattering in semiconductor double quantum wells subject to a perpendicular magnetic field is calculated. Due to the interwell interference contribution in the matrix element of the electron-phonon interaction, the relaxation rate shows oscillations as a function of the magnetic field and level splitting. Significant (more than two orders of magnitude) suppressing of the relaxation rate near the minimums of the oscillations is found.