Devices for investigating low temperature electronic transport in graphene under surface acoustic wave irradiation

Surface acoustic waves can be generated by an interdigital transducer on a piezoelectric material driven by an ac voltage. When exposed to surface acoustic waves, a tunable acoustic current has recently been realized by changing the charge carrier density on large scale CVD graphene devices using an electrolytic gate in aqueous solution [1]. Here we present the fabrication of devices to investigate the effects of such waves on the low-temperature transport properties of graphene using a Hall bar structured graphene-hBN heterostructure on a quartz substrate. Our latest results will be discussed. [1] Okuda S. et al., Acoustic carrier transportation induced by surface acoustic waves in graphene in solution, Appl. Phys. Express 9, 045104 (2016).