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Twisted bilayer graphene goes magnetic

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Emergent ferromagnetism near three-quarters filling in twisted bilayer graphene

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. Here, we present evidence that near three-quarters () filling of the conduction miniband, these enhanced interactions drive the twisted bilayer graphene into a ferromagnetic state. In a narrow density range around an apparent insulating state at , we observe emergent ferromagnetic hysteresis, with a giant anomalous Hall (AH) effect as large as 10.4 kilohms and indications of chiral edge states. Notably, the magnetization of the sample can be reversed by applying a small direct current. Although the AH resistance is not quantized, and dissipation is present, our measurements suggest that the system may be an incipient Chern insulator.

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[ASAP] Quantum Interference Engineering of Nanoporous Graphene for Carbon Nanocircuitry

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Journal of the American Chemical Society
DOI: 10.1021/jacs.9b04649

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Innovative technique to synthesise advanced graphene-based nanocomposites

Green and straightforward process for the synthesis of graphene-based nanomaterials.

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[ASAP] Electrical and Label-Free Quantification of Exosomes with a Reduced Graphene Oxide Field Effect Transistor Biosensor

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Analytical Chemistry
DOI: 10.1021/acs.analchem.9b01950

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[ASAP] Polymer-Brush-Decorated Graphene Oxide: Precision Synthesis and Liquid-Crystal Formation

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Langmuir
DOI: 10.1021/acs.langmuir.9b01747

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[ASAP] Negatively Curved Warped Nanographene Self-Assembled on Metal Surfaces

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Journal of the American Chemical Society
DOI: 10.1021/jacs.9b05501

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[ASAP] Superhydrophobic Ultraflexible Triple-Network Graphene/Polyorganosiloxane Aerogels for a High-Performance Multifunctional Temperature/Strain/Pressure Sensing Array

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Chemistry of Materials
DOI: 10.1021/acs.chemmater.9b02437

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[ASAP] Layer-by-Layer AB-Stacked Bilayer Graphene Growth Through an Asymmetric Oxygen Gateway

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Chemistry of Materials
DOI: 10.1021/acs.chemmater.9b01095

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A modified device fabrication process achieves enhanced spin transport in graphene

Researchers have proposed a modified graphene-based nanodevice fabrication technique that has increased up to three times the spin lifetime and relaxation length compared to previous work of the same kind.

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