Graphene bilayers with a twist

EY Andrei, AH MacDonald - Nature materials, 2020 - nature.com
Near a magic twist angle, bilayer graphene transforms from a weakly correlated Fermi liquid
to a strongly correlated two-dimensional electron system with properties that are …

Electronic-structure methods for twisted moiré layers

S Carr, S Fang, E Kaxiras - Nature Reviews Materials, 2020 - nature.com
When single layers of 2D materials are stacked on top of one another with a small twist in
orientation, the resulting structure often involves incommensurate moiré patterns. In these …

Fractional Chern insulators in magic-angle twisted bilayer graphene

Y Xie, AT Pierce, JM Park, DE Parker, E Khalaf… - Nature, 2021 - nature.com
Abstract Fractional Chern insulators (FCIs) are lattice analogues of fractional quantum Hall
states that may provide a new avenue towards manipulating non-Abelian excitations. Early …

Tunable strongly coupled superconductivity in magic-angle twisted trilayer graphene

JM Park, Y Cao, K Watanabe, T Taniguchi… - Nature, 2021 - nature.com
Moiré superlattices, have recently emerged as a platform upon which correlated physics and
superconductivity can be studied with unprecedented tunability,,–. Although correlated …

Maximized electron interactions at the magic angle in twisted bilayer graphene

A Kerelsky, LJ McGilly, DM Kennes, L Xian… - Nature, 2019 - nature.com
The electronic properties of heterostructures of atomically thin van der Waals crystals can be
modified substantially by moiré superlattice potentials from an interlayer twist between …

Superconductors, orbital magnets and correlated states in magic-angle bilayer graphene

X Lu, P Stepanov, W Yang, M Xie, MA Aamir, I Das… - Nature, 2019 - nature.com
Superconductivity can occur under conditions approaching broken-symmetry parent states.
In bilayer graphene, the twisting of one layer with respect to the other at 'magic'twist angles …

Cascade of electronic transitions in magic-angle twisted bilayer graphene

D Wong, KP Nuckolls, M Oh, B Lian, Y Xie, S Jeon… - Nature, 2020 - nature.com
Magic-angle twisted bilayer graphene exhibits a variety of electronic states, including
correlated insulators,–, superconductors,–and topological phases,,. Understanding the …

Moiré quantum chemistry: charge transfer in transition metal dichalcogenide superlattices

Y Zhang, NFQ Yuan, L Fu - Physical Review B, 2020 - APS
Transition metal dichalcogenide (TMD) bilayers have recently emerged as a robust and
tunable moiré system for studying and designing correlated electron physics. In this Rapid …

Origin of magic angles in twisted bilayer graphene

G Tarnopolsky, AJ Kruchkov, A Vishwanath - Physical review letters, 2019 - APS
Twisted bilayer graphene (TBG) was recently shown to host superconductivity when tuned to
special “magic angles” at which isolated and relatively flat bands appear. However, until …

Ground state and hidden symmetry of magic-angle graphene at even integer filling

N Bultinck, E Khalaf, S Liu, S Chatterjee, A Vishwanath… - Physical Review X, 2020 - APS
In magic angle twisted bilayer graphene (TBG), electron-electron interactions play a central
role, resulting in correlated insulating states at certain integer fillings. Identifying the nature …