Comment on "Dirac electrons in a dodecagonal graphene quasicrystal"

TL;DR

This paper clarifies that a recently claimed dodecagonal graphene quasicrystal is actually a Moire pattern, challenging the previous interpretation of the structure's nature.

Contribution

The authors demonstrate that the structure is a Moire pattern, not a true quasicrystal, correcting the interpretation of the experimental system.

Findings

The structure is a Moire pattern, not a quasicrystal.

The distinction impacts the understanding of Dirac electron states.

The paper clarifies the structural classification of the system.

Abstract

In a recent letter, Ahn and Moon, et al. (2018) studied the quantum states of Dirac electrons in a two-dimensional structure realized by epitaxial growth of twisted bilayer graphene rotated exactly 30 degrees. They claim this structure to be a graphene quasicrystal with dodecagonal quasicrystalline order. However, as we show in this comment, it is not a quasicrystalline structure, but a Moire pattern.