Particle Transport in Graphene Nanoribbon Driven by Ultrashort Pulses

TL;DR

This paper investigates how ultrashort periodic pulses influence charge transport in graphene nanoribbons, revealing tunable conductivity through exact solutions of the Dirac equation under kicking potentials.

Contribution

It provides an exact analytical approach to understand and control charge transport in graphene nanoribbons driven by time-periodic external fields.

Findings

Conductivity can be widely tuned by adjusting kicking parameters.

Exact solutions of the time-dependent Dirac equation are used.

Quasienergy levels evolve dynamically under periodic driving.

Abstract

We study charge transport in a graphene zigzag nanoribbon driven by an external time-periodic kicking potential. Using the exact solution of the time-dependent Dirac equation with a delta-kick potential acting in each period, we study the time evolution of the quasienergy levels and the time-dependent optical conductivity. By variation of the kicking parameters, the conductivity becomes widely tunable.