Comment on "Photon-assisted electron transport in graphene: Scattering theory analysis"

TL;DR

This paper critiques a previous study on photon-assisted electron transport in graphene, highlighting calculation errors and emphasizing the importance of correct modeling for accurate results.

Contribution

It identifies and corrects specific mistakes in prior work, clarifying the expected differences in photon-assisted transport phenomena in graphene.

Findings

Incorrect sidebands and step features were due to calculation errors

Correct modeling significantly alters the predicted transport characteristics

Highlights the necessity of precise theoretical analysis in graphene transport studies

Abstract

It is argued that Trauzettel et al. [Phys. Rev. B 75, 035305 (2007)] made some mistakes in their calculations regarding the photon-assisted transport in graphene that lead to uncoupled sidebands and emergence of step-like features in dG/dV (G is differential conductance and V is the bias voltage). We discuss the relevant corrections and explain in detail how the correct results are expected to be quite different than the incorrect ones.