Science of 2.5 dimensional materials: paradigm shift of materials science toward future social innovation

H Ago, S Okada, Y Miyata, K Matsuda… - … and Technology of …, 2022 - Taylor & Francis
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) …

Twisted trilayer graphene: A precisely tunable platform for correlated electrons

Z Zhu, S Carr, D Massatt, M Luskin, E Kaxiras - Physical review letters, 2020 - APS
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 …

Multiscale lattice relaxation in general twisted trilayer graphenes

N Nakatsuji, T Kawakami, M Koshino - Physical Review X, 2023 - APS
We present comprehensive theoretical studies on the lattice relaxation and the electronic
structures in general nonsymmetric twisted trilayer graphenes. By using an effective …

In situ manipulation of van der Waals heterostructures for twistronics

Y Yang, J Li, J Yin, S Xu, C Mullan, T Taniguchi… - Science …, 2020 - science.org
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 …

Topological flat bands in rhombohedral tetralayer and multilayer graphene on hexagonal boron nitride moiré superlattices

Y Park, Y Kim, BL Chittari, J Jung - Physical Review B, 2023 - APS
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 …

Higher order gaps in the renormalized band structure of doubly aligned hBN/bilayer graphene moiré superlattice

MK Jat, P Tiwari, R Bajaj, I Shitut, S Mandal… - Nature …, 2024 - nature.com
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 …

Ultrahigh-resolution scanning microwave impedance microscopy of moiré lattices and superstructures

K Lee, MIB Utama, S Kahn, A Samudrala… - Science …, 2020 - science.org
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 …

Electric field tunable layer polarization in graphene/boron-nitride twisted quadrilayer superlattices

Z Zhu, S Carr, Q Ma, E Kaxiras - Physical Review B, 2022 - APS
The recently observed unconventional ferroelectricity in AB bilayer graphene sandwiched by
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

J Shin, BL Chittari, J Jung - Physical Review B, 2021 - APS
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 …

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 …