The results presented in Fig. 3
show multiple oscillations which change with the
angle between the magnetic field and the surface
normal, indicative of a 2DEG occupying the
Ino.15Ga0.ssAs potential well. Since the oscillations
had a background magnetoresistance, high-pass filtering
was performed in order to get rid of it; the
data were digitized linearly in terms of the inverse of
the magnetic field