Analysis of doorway states in a graphene structure

TL;DR

This paper investigates doorway states in graphene structures, analyzing their theoretical properties and impact on electronic transport using a simplified two-dimensional potential barrier model.

Contribution

It introduces a theoretical analysis of doorway states in graphene, linking them to electronic transport phenomena in voltage-tuned structures.

Findings

Doorway states influence electronic transport in graphene.

Theoretical modeling of potential barriers reveals doorway state characteristics.

Implications for designing graphene-based electronic devices.

Abstract

Doorway states, which are related to the strength function phenomenon and giant resonances, arise when two systems interact, one with a high density eigenvalue spectrum and the other with a comparatively low density. These concepts, first studied in nuclear physics in the 40's, are here analyzed from a theoretical point of view in special and simple graphene structures, obtained after applying appropriate voltages to a graphene sheet. The influence of the doorway states on the electronic transport in these systems is also studied. To analyze these effects we consider a two-dimensional model of two potential barriers of equal height but very different widths separated by a well.