30${}^{\circ }$-twisted bilayer graphene quasicrystals from chemical vapor deposition

Abstract

The artificial stacking of atomically thin crystals suffers from intrinsic limitations in terms of control and reproducibility of the relative orientation of exfoliated flakes. This drawback is particularly severe when the properties of the system critically depend on the twist angle, as in the case of the dodecagonal quasicrystal formed by two graphene layers rotated by 30${}^{\circ }$. Here we show that large-area 30${}^{\circ }$-rotated bilayer graphene can be grown deterministically by chemical vapor deposition on Cu, eliminating the need of artificial assembly. The quasicrystals are easily transferred to arbitrary substrates and integrated in high-quality hBN-encapsulated heterostructures, which we process into dual-gated devices exhibiting carrier mobility up to $10^5$ cm${}^2$/Vs. From low-temperature magnetotransport, we find that the graphene quasicrystals effectively behave as uncoupled graphene layers, showing 8-fold degenerate quantum Hall states: this result indicates that the Dirac cones replica detected by previous photo-emission experiments do not contribute to the electrical transport.

This is the unedited authors' version of the submitted article, published in its final form on Nano Letters 2020 https://doi.org/10.1021/acs.nanolett.0c00172 , 21 pages, 3 figures and supporting information

References in corpus (10)

• The Raman Fingerprint of Graphene
• Electrochemically Top Gated Graphene: Monitoring Dopants by Raman Scattering
• Optical Separation of Mechanical Strain from Charge Doping in Graphene
• Single Layer Behavior and Its Breakdown in Twisted Graphene Layers
• Reduction of Fermi velocity in folded graphene observed by resonance Raman spectroscopy
• Symmetry Breaking in Few Layer Graphene Films
• Rapid CVD growth of millimetre-sized single crystal graphene using a cold-wall reactor
• Quasicrystalline electronic states in 30${}^{\circ }$ rotated twisted bilayer graphene
• Interlayer Decoupling in 30° Twisted Bilayer Graphene Quasicrystal
• Stacking transition in bilayer graphene caused by thermally activated rotation

Cited by in corpus (37)

• Quantum Nanophotonics in Two-Dimensional Materials
• High-quality electrical transport using scalable CVD graphene
• Electrical band flattening, valley flux, and superconductivity in twisted trilayer graphene
• Synthesis of large-area rhombohedral few-layer graphene by chemical vapor deposition on copper
• Twistronics in graphene-based van der Waals structures
• Layer-Dependent Topological Phase in a Two-Dimensional Quasicrystal and Approximant
• Theory of polar domains in moiré heterostructures
• Charge 4e superconductivity and chiral metal in the $45^{\circ }$-twisted bilayer cuprates and similar bilayers
• Controlled alignment of supermoiré lattice in double-aligned graphene heterostructures
• Quasicrystalline electronic states in twisted bilayers and the effects of interlayer and sublattice symmetries
• Pressure and electric field dependence of quasicrystalline electronic states in 30${}^{\circ }$ twisted bilayer graphene
• Probing interlayer interactions and commensurate-incommensurate transition in twisted bilayer graphene through Raman spectroscopy
• High-Angular-Momentum Topological Superconductivity in the Largest-Angle Twisted Homo-bilayer Systems
• Electronic structure of 30° twisted double bilayer graphene
• Growth and applications of two-dimensional single crystals
• Robust Spin Interconnect with Isotropic Spin Dynamics in Chemical Vapour Deposited Graphene Layers and Boundaries
• Interlayer hybridization in graphene quasicrystal and other bilayer graphene systems
• Large twisting angles in Bilayer graphene Moire quantum dot structures
• Parallel transport and layer-resolved thermodynamic measurements in twisted bilayer graphene
• Quasiperiodic pairing in graphene quasicrystals
• Progress on band structure engineering of twisted bilayer and two-dimensional moiré heterostructures
• Moiré-Induced Transport in CVD-Based Small-Angle Twisted Bilayer Graphene
• Making Chiral Topological Superconductivities from Non-topological Superconductivities Through the Twist
• Resonant interaction in chiral, Eshelby-twisted van der Waals atomic layers
• Built-in Bernal gap in large-angle-twisted monolayer-bilayer graphene
• Quasicrystalline 30${}^{\circ }$ twisted bilayer graphene: Fractal patterns and electronic localization properties
• Supersymmetry dictated topology in periodic gauge fields and realization in strained and twisted 2D materials
• Non-Abelian topological superconductivity in maximally twisted double-layer spin-triplet valley-singlet superconductors
• Band structure and band topology in twisted homotrilayer transition metal dichalcogenides
• Manipulating electron waves in graphene using carbon nanotube gating
• Quasicrystalline Spin Liquid
• Electronic Reconstruction at the Quasicrystal-Moiré Crossover in Twisted Bilayer Graphene
• Skyrmionic Transport and First Order Phase Transitions in Twisted Bilayer Graphene Quantum Hall Ferromagnet
• Raman Characterization of Two-Dimensional Quasiperiodic Antiferromagnets on Various Lattices: Spin-Orbit Mechanism
• Proximity Effects Between the Graphene Quasicrystal and Magic-Angle Twisted Bilayer Graphene
• Decomposing Electronic Structures in Twisted Multilayers: Bridging Spectra and Incommensurate Wave Functions
• Direct observation of flat bands in near-magic-angle twisted bilayer CVD graphene