Large twisting angles in Bilayer graphene Moire quantum dot structures

TL;DR

This paper investigates how large twisting angles in bilayer graphene Moire quantum dots affect their electronic properties, revealing new symmetry tuning mechanisms and illustrating the physics with a simplified approach.

Contribution

It introduces a novel perspective on large angle twisted bilayer graphene quantum dots, highlighting the role of effective velocity reduction and symmetry control.

Findings

Large twisting angles can tune the position symmetry in graphene systems.

A new illustrative property related to commutation relations is identified.

Complete overview of large angle twisting effects on quantum dot systems is provided.

Abstract

Recent exploration of the commensurate structure in the turbostratic double layer graphene shows that the large angle twisting can be treated by the decrease of the effective velocity within the energy spectra of the single layer graphene. Within our work, we use this result as a starting point, aiming towards understanding the physics of by a large angle twisted double layer graphene (i.e. Moire) quantum dot systems. We show that within this simple approach using the language of the first quantization, yet another so far unrealized (not up to our knowledge), illustrative property of the commutation relation appears in the graphene physics. Intriguingly, large twisting angles show to be a suitable tunning knob of the position symmetry in the graphene systems. Complete overview of the large angle twisting on the considered dot systems is provided.