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 …

Superconductivity and strong correlations in moiré flat bands

L Balents, CR Dean, DK Efetov, AF Young - Nature Physics, 2020 - nature.com
Strongly correlated systems can give rise to spectacular phenomenology, from high-
temperature superconductivity to the emergence of states of matter characterized by long …

Magic-angle twisted bilayer graphene as a topological heavy fermion problem

ZD Song, BA Bernevig - Physical review letters, 2022 - APS
Magic-angle (θ= 1.0 5°) twisted bilayer graphene (MATBG) has shown two seemingly
contradictory characters: the localization and quantum-dot-like behavior in STM …

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 …

Emergent ferromagnetism near three-quarters filling in twisted bilayer graphene

AL Sharpe, EJ Fox, AW Barnard, J Finney, K Watanabe… - Science, 2019 - science.org
When two sheets of graphene are stacked at a small twist angle, the resulting flat
superlattice minibands are expected to strongly enhance electron-electron interactions …

Isospin Pomeranchuk effect in twisted bilayer graphene

Y Saito, F Yang, J Ge, X Liu, T Taniguchi, K Watanabe… - Nature, 2021 - nature.com
In condensed-matter systems, higher temperatures typically disfavour ordered phases,
leading to an upper critical temperature for magnetism, superconductivity and other …

Cascade of phase transitions and Dirac revivals in magic-angle graphene

U Zondiner, A Rozen, D Rodan-Legrain, Y Cao… - Nature, 2020 - nature.com
Twisted bilayer graphene near the magic angle,,–exhibits rich electron-correlation physics,
displaying insulating,,–, magnetic, and superconducting phases,–. The electronic bands of …

Untying the insulating and superconducting orders in magic-angle graphene

P Stepanov, I Das, X Lu, A Fahimniya, K Watanabe… - Nature, 2020 - nature.com
The coexistence of superconducting and correlated insulating states in magic-angle twisted
bilayer graphene,,,,,,,,,–prompts fascinating questions about their relationship. Independent …

Tuning superconductivity in twisted bilayer graphene

M Yankowitz, S Chen, H Polshyn, Y Zhang… - Science, 2019 - science.org
Materials with flat electronic bands often exhibit exotic quantum phenomena owing to strong
correlations. An isolated low-energy flat band can be induced in bilayer graphene by simply …