TILTED-FIELD MAGNETOOPTICAL ABSORPTION IN AN IMPERFECT PARABOLIC QUANTUM-WELL

We study the far-infrared optical absorption spectrum of electrons confined in an imperfect parabolic quantum well in a magnetic field tilted with respect to the growth axis. The calculations are carried out at finite temperature using a self-consistent-field approach both with and without a local exchange-correlation potential. We choose well parameters to match a real experimental sample and obtain excellent quantitative agreement over a wide range of magnetic-field strengths. We discuss the effects of possible asymmetries in the confining potential, and conclude that the infrared spectrum is dominated by depolarization and finite-temperature effects.