Klein tunneling through double barrier in ABC-trilayer graphene

TL;DR

This paper investigates Klein tunneling and conductance in ABC-stacked trilayer graphene with double barriers, revealing how barrier parameters affect electron transport and resonant phenomena.

Contribution

It provides a detailed analysis of Klein tunneling in ABC-trilayer graphene using continuum models, highlighting the effects of barrier configurations on transport properties.

Findings

Transport is sensitive to barrier height, width, and separation.

Klein paradox occurs at normal incidence.

Resonant features influence ballistic conductance.

Abstract

Klein tunneling and conductance for Dirac fermions in ABC-stacked trilayer graphene (ABC-TLG) through symmetric and asymmetric double potential barriers are investigated using the two and six-band continuum model. Numerical results for our system show that the transport is sensitive to the height, the width and the distance between the two barriers. Klein paradox at normal incidence and resonant features at non-normal incidence in the transmission result from resonant electron states in the wells or hole states in the barriers and strongly influence the ballistic conductance of the structures.