Abstract
We theoretically investigated the influence of pressure and temperature
on the electronic and optical properties of a GaAs /Al0.3Ga0.7As quantum ring, described
by a combination of a parabolic potential and an inverse square one, in the presence of
the magnetic field. The results reveal a variation with pressure and temperature of the
period of Aharonov-Bohm oscillations appearing in the electronic spectra in magnetic
field. This period varies nonlinearly with pressure and temperature. In the absorption
spectra and refractive index variation at 4 K, we found that with the increment of the
magnetic field or of the pressure more transitions are allowed. When no external pressure
is applied, the absorption maxima shift to lower energies at increasing magnetic field,
but with increasing pressure, the absorption maxima red-shift at intermediate magnetic
fields and blue-shift at high fields.