Signatures of magnetism in zigzag graphene nanoribbon embedded in h-BN lattice
arXiv:2511.13075 · doi:10.1038/s41563-025-02317-4
Abstract
Zigzag edges of graphene have long been predicted to exhibit magnetic electronic state near the Fermi level, which can cause spin-related phenomena and offer unique potentials for graphene-based spintronics. However, the magnetic conduction channels along these edges have yet been reported experimentally. Here, we report the observation on signatures of magnetism in zigzag graphene nanoribbons (zGNRs) embedded in hexagonal boron nitride (h-BN). The in-plane bonding with BN can stabilize the edges of zGNRs, and thus enable a direct probing of the intrinsic magnetism. Firstly, the presence of magnetism of a zGNR was confirmed by scanning NV center microscopy. And then, zGNR was fabricated into a transistor with a width of ~9 nm wide and a channel length of sub-50 nm. By performing magneto-transport measurements, Fabry-Pérot interference patterns were observed in the transistor at 4 Kelvin, which indicates a coherent transport through the channel. A large magnetoresistance of ~175 Ω, corresponding to a ratio of ~1.3 %, was observed at the same temperature. More importantly, such magneto-transport signal is highly anisotropic on the magnetic field direction, and its appearance extends well above room temperature. All these evidences corroborate the existence of robust magnetic ordering in the edge state of zGNR. The findings on zGNR embedded in h-BN provide an effective platform for the future exploration of graphene-based spintronic devices.
30 pages, 17 figures
References in corpus (23)
- Half-Metallic Graphene Nanoribbons
- High-sensitivity diamond magnetometer with nanoscale resolution
- Dissipationless Quantum Spin Current at Room Temperature
- Graphene Spintronics
- Room Temperature All Semiconducting sub-10nm Graphene Nanoribbon Field-Effect Transistors
- Room temperature magnetic order on zigzag edges of narrow graphene nanoribbons
- Probing magnetism in 2D materials at the nanoscale with single spin microscopy
- Etching and Narrowing of Graphene from the Edges
- The unique chemical reactivity of a graphene nanoribbon's zigzag edge
- Graphene nanoribbons for quantum electronics
- Will Zigzag Graphene Nanoribbon Turn to Half Metal under Electric Field?
- Spin currents in rough graphene nanoribbons: Universal fluctuations and spin injection
- Real-space imaging of non-collinear antiferromagnetic order with a single spin magnetometer
- Tailoring Magnetic Anisotropy in CrGeTe by Electrostatic Gating
- Spin Splitting of Dopant Edge States in Magnetic Zigzag Graphene Nanoribbons
- Silane-Catalyzed Fast Growth of Large Single-Crystalline Graphene on Hexagonal Boron Nitride
- High-temperature ferromagnetism of electrons in narrow impurity bands: Application to CaB
- Oriented Graphene Nanoribbons Embedded in Hexagonal Boron Nitride Trenches
- Towards Chirality Control of Graphene Nanoribbons Embedded in Hexagonal Boron Nitride
- Detecting the spin-polarization of edge states in graphene nanoribbons
- Twisted bilayer zigzag-graphene nanoribbon junctions with tunable edge states
- Edge Control of Graphene Domains Grown on Hexagonal Boron Nitride
- Dirac half-semimetallicity and antiferromagnetism in graphene nanoribbon/hexagonal boron nitride heterojunctions