Pristine graphene has been considered one of the most promising materials because of its
excellent physical and chemical properties. However, various defects in graphene produced …

This article reviews the theoretical and experimental work related to the electronic properties
of bilayer graphene systems. Three types of bilayer stackings are discussed: the AA, AB, and …

We present a systematic Raman study of unconventionally stacked double-layer graphene,
and find that the spectrum strongly depends on the relative rotation angle between layers …

Extensive scanning tunneling microscopy and spectroscopy experiments complemented by
first-principles and parametrized tight binding calculations provide a clear answer to the …

We report on unprecedentedly large-scale density-functional calculations that clarify atomic
and electronic structures of twisted bilayer graphene (BLG). We find the existence of the …

The pairing symmetry of the Hubbard Hamiltonian on a triangle lattice with a nearly flat low-
energy band is studied with the determinant quantum Monte Carlo method (DQMC). We …

The analysis of the electronic properties of strained or lattice deformed graphene combines
ideas from classical condensed matter physics, soft matter, and geometrical aspects of …

Rotated graphene multilayers form a new class of graphene-related systems with electronic
properties that drastically depend on the rotation angles. It has been shown that bilayers …

Abstract Two-dimensional (2D) materials exhibit enhanced physical, chemical, electronic,
and optical properties when compared to those of bulk materials. Graphene demands …

Recent studies show that two low-energy van Hove singularities (VHSs) seen as two
pronounced peaks in the density of states could be induced in a twisted graphene bilayer …