Theoretical investigation of magnetoresistivity oscillations modulated by a terahertz field in quantum wells with parabolic potential

The magnetoresistivity (MR) in a parabolic quantum well (PQW), subjected to a crossed dc electric field and magnetic field, modulated by a terahertz field (TF), is theoretically calculated. The electron - acoustic phonon interaction is taken into account at low temperatures. In the case of absence of the TF, the Shubnikov - de Haas oscillations are observed. The temperature dependence of the relative amplitude of these oscillations is in good agreement with previous theories and experiments in some two-dimensional electron systems. In the presence of the TF, there exist the oscillations in the MR which are similar to those observed experimentally in some two-dimensional electron systems. The amplitude of these oscillations increases with increasing the TF amplitude (intensity).