Comment on "Cyclotron resonance study of the electron and hole velocity in graphene monolayers"

TL;DR

This comment challenges the uniqueness of electron velocity measurements in graphene, highlighting historical measurements in GaAs, and discusses the need for a universal electrodynamics framework for quantum Hall effects and superconductivity.

Contribution

It questions the interpretation of electron velocities in graphene and proposes a new approach based on massless electron dynamics and photon fluid angular momentum.

Findings

Electron velocities in graphene are similar to those measured in GaAs.

The particle-antiparticle asymmetry in graphene is puzzling and warrants further investigation.

A proposed experiment compares electron velocities in graphene and GaAs to test new electrodynamics theories.

Abstract

In this comment it is pointed out that the electron velocity of the same order as observed in graphene had been measured in GaAs submicron devices long ago. Particle- antiparticle asymmetry related with electron and hole effective masses in graphene seems puzzling as hole in a condensed matter system cannot be treated as anti-electron. It is argued that there should be a universal electrodynamics for QHE and superconductivity. In this context attention is drawn to the new approach based on massless electron and the interpretation that magnetic field represents angular momentum of the photon fluid. Measurement of electron velocity in graphene and GaAs in parallel is suggested for testing the massless electrodynamics.