Surface acoustic-wave-induced magnetoresistance oscillations in a two-dimensional electron gas.
We study the geometrical commensurability oscillations imposed on the resistivity of 2D electrons in a perpendicular magnetic field by a propagating surface acoustic wave (SAW). We show that, for omega<omega(c), this effect contains an anisotropic dynamical classical contribution increasing the resistivity and a nonequilibrium quantum contribution isotropically decreasing the resistivity, and we predict zero-resistance states associated with geometrical commensurability at large SAW amplitude.
Robinson
John P
JP
Physics Department, Lancaster University, Lancaster LA1 4YB, United Kingdom.
Kennett
Malcolm P
MP
Cooper
Nigel R
NR
Fal'ko
Vladimir I
VI