Design of electron wave filters in monolayer graphene by tunable transmission gap

TL;DR

This paper explores how to control electron wave transmission in monolayer graphene by tuning barrier parameters, revealing a transmission gap influenced by incidence angle and potential barrier characteristics, with potential device applications.

Contribution

It introduces a method to modulate transmission gaps in graphene-based devices through tunable parameters, considering both Klein tunneling and classical motion effects.

Findings

Transmission gap depends on incidence energy and angle.

Modulation of the gap is achieved by adjusting barrier height and width.

Potential for graphene electronic device applications.

Abstract

We have investigated the transmission in monolayer graphene barrier at nonzero angle of incidence. Taking the influence of parallel wave vector into account, the transmission as the function of incidence energy has a gap due to the evanescent waves in two cases of Klein tunneling and classical motion. The modulation of the transmission gap by the incidence angle, the height, and width of potential barrier may lead to potential applications in graphene-based electronic devices.