Acoustic charge transport in graphene

Abstract

We present an experimental demonstration of acoustically induced current in graphene. CVD-grown layers of graphene were transferred to the surface of highly piezoelectric lithium niobate. This allowed integration of graphene with interdigital transducers used to generate and detect surface acoustic waves (SAWs). A continuous wave RF signal applied to the transducers at their resonant frequency generates a DC current flow, which has a linear dependence on the applied RF power and can be induced against an applied bias. These findings could provide the basis for new ways of studying electron transport in graphene.