Electron tunneling through graphene-based double barriers driven by a periodic potential

TL;DR

This paper investigates photon-assisted electron tunneling in graphene double barriers under periodic driving, revealing quantum interference effects that can be utilized for designing graphene-based filters and detectors.

Contribution

It introduces a Floquet-based transfer matrix approach to analyze inelastic tunneling and identifies a phase difference that cancels sideband transmission, advancing understanding of driven graphene transport.

Findings

Critical phase difference cancels inelastic sideband transmission.

Harmonic fields can suppress resonant tunneling.

Results aid in designing graphene-based high-frequency devices.

Abstract

Photon-assisted charge transport through a double barrier structure under a time periodic field in graphene is studied. Within the framework of the Floquet formalism and using the transfer matrix method, the transmission probabilities for the central band and sidebands are calculated. A critical phase difference between the harmonic potentials at the barriers, which cancels transmission through the inelastic sidebands due to quantum interference is found. This phenomenon could be of help to design graphene based filters and high-frequency radiation detectors. Quenching of resonant tunneling by the harmonic field applied to the barriers or the well is also discussed.