HOT-ELECTRON MAGNETOPHONON RESONANCE OF QUANTUM-WELLS IN TILTED MAGNETIC-FIELDS

The nonlinear dc magnetoconductivity of a parabolic quantum well under high tilted magnetic fields is evaluated analytically for the optical -phonon scattering, by using the formalism of the nonlinear-response t heory developed previously. The results show two characteristic oscill ating behaviors, as a function of the magnetic field, with electric-fi eld-induced resonances occurring in the hot-electron regime when P ome ga(+) = omega(L) and P omega_ = omega(L)*, where omega(+/-) and omega (L) are two hybrid eigenfrequencies of the system under the tilted ma gnetic held and the effective phonon frequencies, respectively, and P is an integer. The resonance peaks appear as either maxima or minima d epending on the confinement frequency, the magnetic-field angle, and t he electric field.