Acoustically induced current flow in graphene

作者：Miseikis V; Cunningham J E^*; Saeed K; O' Rorke R; Davies A G

来源：Applied Physics Letters, 2012, 100(13): 133105.

DOI：10.1063/1.3697403

We demonstrate the directed control of charge carriers in graphene using the electric field that accompanies the propagation of surface acoustic waves (SAWs) on a piezoelectric surface. Graphene grown by chemical vapor deposition was transferred to the surface of lithium niobate, allowing its direct integration with interdigital transducers used for SAW generation and detection. Radio frequency (RF) signal applied to the transducers at their resonant frequency was found to generate a direct current flow by the transport of p-type charge carriers. The acoustically induced current scales linearly with the applied RF power and can be observed even in presence of a counter-flow current induced by an applied bias.

• 出版日期2012-3-26