Acoustoelectric Effect in Graphene with degenerate Energy dispersion

TL;DR

This paper theoretically investigates the acoustoelectric effect in graphene with degenerate energy dispersion, analyzing its dependence on frequency and temperature at low temperatures, and comparing results with experimental data.

Contribution

It provides a theoretical analysis of the acoustoelectric effect in graphene with degenerate dispersion, including numerical analysis and comparison with experiments.

Findings

Non-linear dependence of acoustoelectric current on frequency and temperature.

Qualitative agreement with experimental results for current versus frequency.

Current manifests at low temperatures.

Abstract

The acoustoelectric effect $AE$ in Graphene with degenerate energy dispersion is theoretically studied for hypersound in the regime $ql >> 1$. At low temperatures ($k_{\beta}T <<1$), the non-linear dependence of Acoustoelectric current $j/j_0$ on the frequency $\omega_q$ and temperature $T$ are numerically analysed. The obtained graph for $j/j_0$ against $\omega_q$ qualitatively agreed with an experimentally obtained results. For $j/j_0$ versus $T$, the dependence of Acoustoelectric current in Graphene was found to manifest at low temperatures.