Effect of pseudospin polarization on wave packet dynamics in graphene antidot lattices (GALs) in the presence of a normal magnetic field

TL;DR

This paper explores how pseudospin polarization influences electron wave packet dynamics in graphene and graphene antidot lattices under magnetic fields, revealing tunable electron transport properties.

Contribution

It demonstrates control of electron wave packet propagation via pseudospin polarization and antidot lattice engineering in graphene systems.

Findings

Wave packet propagation depends on pseudospin polarization.

Propagation can be directed by antidot lattice design.

Electron transport tunability is achieved through pseudospin and magnetic field.

Abstract

We have investigated the role of pseudospin polarization in electron wave packet dynamics in pristine graphene and in a graphene antidot lattice subject to an external magnetic field. Employing a Green's function formalism, we show that the electron dynamics can be controlled by tuning pseudospin polarization. We find that in Landau quantized pristine graphene both the propagation of an electron wave packet and Zitterbewegung oscillations strongly depend on pseudospin polarization. The electron wave packet is found to propagate in the direction of initial pseudospin polarization. We also show that, in this system, the propagation of an electron can be enhanced in any desired direction by carving a one dimensional antidot lattice in that direction. The study suggests that a graphene antidot lattice can serve as a channel for electron transport with the possibility of tunability by means of pseudospin polarization, antidot potential and applied normal magnetic field strength.