Science of 2.5 dimensional materials: paradigm shift of materials science toward future social innovation
The past decades of materials science discoveries are the basis of our present society–from
the foundation of semiconductor devices to the recent development of internet of things (IoT) …
the foundation of semiconductor devices to the recent development of internet of things (IoT) …
Twisted trilayer graphene: A precisely tunable platform for correlated electrons
We introduce twisted trilayer graphene (tTLG) with two independent twist angles as an ideal
system for the precise tuning of the electronic interlayer coupling to maximize the effect of …
system for the precise tuning of the electronic interlayer coupling to maximize the effect of …
Multiscale lattice relaxation in general twisted trilayer graphenes
We present comprehensive theoretical studies on the lattice relaxation and the electronic
structures in general nonsymmetric twisted trilayer graphenes. By using an effective …
structures in general nonsymmetric twisted trilayer graphenes. By using an effective …
In situ manipulation of van der Waals heterostructures for twistronics
In van der Waals heterostructures, electronic bands of two-dimensional (2D) materials, their
nontrivial topology, and electron-electron interactions can be markedly changed by a moiré …
nontrivial topology, and electron-electron interactions can be markedly changed by a moiré …
Topological flat bands in rhombohedral tetralayer and multilayer graphene on hexagonal boron nitride moiré superlattices
We show that rhombohedral four-layer graphene (4LG) nearly aligned with a hexagonal
boron nitride (hBN) substrate often develops nearly flat isolated low-energy bands with …
boron nitride (hBN) substrate often develops nearly flat isolated low-energy bands with …
Higher order gaps in the renormalized band structure of doubly aligned hBN/bilayer graphene moiré superlattice
This paper presents our findings on the recursive band gap engineering of chiral fermions in
bilayer graphene doubly aligned with hBN. Using two interfering moiré potentials, we …
bilayer graphene doubly aligned with hBN. Using two interfering moiré potentials, we …
Ultrahigh-resolution scanning microwave impedance microscopy of moiré lattices and superstructures
Two-dimensional heterostructures composed of layers with slightly different lattice vectors
exhibit new periodic structure known as moiré lattices, which, in turn, can support novel …
exhibit new periodic structure known as moiré lattices, which, in turn, can support novel …
Electric field tunable layer polarization in graphene/boron-nitride twisted quadrilayer superlattices
The recently observed unconventional ferroelectricity in AB bilayer graphene sandwiched by
hexagonal boron nitride (hBN) presents a new platform to manipulate correlated phases in …
hexagonal boron nitride (hBN) presents a new platform to manipulate correlated phases in …
Stacking and gate-tunable topological flat bands, gaps, and anisotropic strip patterns in twisted trilayer graphene
Trilayer graphene with a twisted middle layer has recently emerged as a new platform
exhibiting correlated phases and superconductivity near its magic angle. A detailed …
exhibiting correlated phases and superconductivity near its magic angle. A detailed …
Fractal energy gaps and topological invariants in hBN/graphene/hBN double moiré systems
H Oka, M Koshino - Physical Review B, 2021 - APS
We calculate the electronic structure in quasiperiodic double moiré systems of graphene
sandwiched by hexagonal boron nitride (hBN) and identify the characteristic integers of …
sandwiched by hexagonal boron nitride (hBN) and identify the characteristic integers of …