▎ 摘　　要

Acoustoelectric current (j(ac)) in Free-Standing Graphene (FSG) having degenerate energy dispersion at low temperatures T << T-BG (T-BG is the Block-Gruneisen temperature) was studied theoretically. We considered electron interaction with in-plain acoustic phonons in the hypersound regime (sound vibration in the range 10(9) - 10(12) Hz). The obtained expression for j(ac) was numerically analyzed for various temperatures (T) and frequencies (w(q)) and graphically presented. The non-linear dependence of j(ac) on w(q) varied with temperature. This qualitatively agreed with an experimentally obtained result which deals with temperature dependent acqustoelectric current in graphene [21]. (C) 2016 Elsevier B.V. All rights reserved.