Superconductivity, superfluidity and quantum geometry in twisted multilayer systems

P Törmä, S Peotta, BA Bernevig - Nature Reviews Physics, 2022 - nature.com
Superconductivity has been observed in moiré systems such as twisted bilayer graphene,
which host flat, dispersionless electronic bands. In parallel, theory work has discovered that …

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 …

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 …

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 …

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 …

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 …

Spectroscopic signatures of many-body correlations in magic-angle twisted bilayer graphene

Y **e, B Lian, B Jäck, X Liu, CL Chiu, K Watanabe… - Nature, 2019 - nature.com
The discovery of superconducting and insulating states in magic-angle twisted bilayer
graphene (MATBG), has ignited considerable interest in understanding the nature of …

Tunable spin-polarized correlated states in twisted double bilayer graphene

X Liu, Z Hao, E Khalaf, JY Lee, Y Ronen, H Yoo… - Nature, 2020 - nature.com
Reducing the energy bandwidth of electrons in a lattice below the long-range Coulomb
interaction energy promotes correlation effects. Moiré superlattices—which are created by …

Electronic correlations in twisted bilayer graphene near the magic angle

Y Choi, J Kemmer, Y Peng, A Thomson, H Arora… - Nature physics, 2019 - nature.com
Twisted bilayer graphene with a twist angle of around 1.1° features a pair of isolated flat
electronic bands and forms a platform for investigating strongly correlated electrons. Here …

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 …