Acoustoelectric drag effect in the two-dimensional electron gas at strong magnetic field

Abstract

We propose a phenomenological theory of the acoustoelectric drag effect. The electric current dragged by the surface acoustic wave is shown to possess the unusual shape of the Shubnikov--de Haas oscillations. Namely, the drag-current component along the wave propagation direction has an oscillating sign and passes through zero near both ${\mathrm{\ensuremath{\sigma}}}_{\mathit{x}\mathit{x}}$ minima and maxima, whereas the perpendicular (i.e., Hall) component oscillates similarly to the diagonal conductivity.