Linear in-plane magnetoconductance and spin susceptibility of a two-dimensional electron gas on a vicinal silicon surface

In this work we have studied the parallel magnetoresistance of a two-dimensional electron gas near a vicinal silicon surface. An unusual, linear magnetoconductance is observed in the fields up to B=15 T, which we explain by the effect of spin polarization on impurity scattering. This linear magnetoresistance shows strong anomalies near the boundaries of the minigap in the electron spectrum of the vicinal system.