Pauli-limit violation and re-entrant superconductivity in moiré graphene

Y Cao, JM Park, K Watanabe, T Taniguchi… - Nature, 2021 - nature.com
Moiré quantum matter has emerged as a materials platform in which correlated and
topological phases can be explored with unprecedented control. Among them, magic-angle …

Zero-field superconducting diode effect in small-twist-angle trilayer graphene

JX Lin, P Siriviboon, HD Scammell, S Liu, D Rhodes… - Nature Physics, 2022 - nature.com
The critical current of a superconductor can be different for opposite directions of current flow
when both time-reversal and inversion symmetry are broken. Such non-reciprocal behaviour …

Orderly disorder in magic-angle twisted trilayer graphene

S Turkel, J Swann, Z Zhu, M Christos, K Watanabe… - Science, 2022 - science.org
Magic-angle twisted trilayer graphene (TTG) has recently emerged as a platform to engineer
strongly correlated flat bands. We reveal the normal-state structural and electronic properties …

Theory of zero-field superconducting diode effect in twisted trilayer graphene

HD Scammell, JIA Li, MS Scheurer - 2D Materials, 2022 - iopscience.iop.org
In a recent experiment (Lin et al 2021 arxiv: 2112.07841 [cond-mat. str-el]), the
superconducting phase hosted by a heterostructure of mirror-symmetric twisted trilayer …

Coulomb interaction, phonons, and superconductivity in twisted bilayer graphene

T Cea, F Guinea - Proceedings of the National Academy of …, 2021 - National Acad Sciences
The polarizability of twisted bilayer graphene, due to the combined effect of electron–hole
pairs, plasmons, and acoustic phonons, is analyzed. The screened Coulomb interaction …

Twistronics in graphene-based van der Waals structures

YN Ren, Y Zhang, YW Liu, L He - Chinese Physics B, 2020 - iopscience.iop.org
The electronic properties of van der Waals (vdW) structures can be substantially modified by
the moiré superlattice potential, which strongly depends on the twist angle among the …

Pairing symmetry of twisted bilayer graphene: A phenomenological synthesis

E Lake, AS Patri, T Senthil - Physical Review B, 2022 - APS
One of the outstanding questions in the study of twisted bilayer graphene—from both
experimental and theoretical points of view—is the nature of its superconducting phase. In …

Moiré nematic phase in twisted double bilayer graphene

C Rubio-Verdú, S Turkel, Y Song, L Klebl, R Samajdar… - Nature Physics, 2022 - nature.com
Graphene moiré superlattices display electronic flat bands. At integer fillings of these flat
bands, energy gaps due to strong electron–electron interactions are generally observed …

Correlated insulators, semimetals, and superconductivity in twisted trilayer graphene

M Christos, S Sachdev, MS Scheurer - Physical Review X, 2022 - APS
Motivated by recent experiments indicating strong superconductivity and intricate correlated
insulating and flavor-polarized physics in mirror-symmetric twisted-trilayer graphene, we …

Interplay of fractional Chern insulator and charge density wave phases in twisted bilayer graphene

P Wilhelm, TC Lang, AM Läuchli - Physical Review B, 2021 - APS
We perform an extensive exact diagonalization study of interaction-driven insulators in spin-
and valley-polarized moiré flat bands of twisted bilayer graphene aligned with its hexagonal …