Approaching magnetic ordering in graphene materials by FeCl${}_3$ intercalation

Abstract

We show the successful intercalation of large area (1 cm${}^2$) epitaxial few-layer graphene grown on 4H-SiC with FeCl${}_3$. Upon intercalation the resistivity of this system drops from an average value of $\approx 200\Omega /sq$ to $\approx 16\Omega /sq$ at room temperature. The magneto-conductance shows a weak localization feature with a temperature dependence typical of graphene Dirac fermions demonstrating the decoupling into parallel hole gases of each carbon layer composing the FeCl${}_3$ intercalated structure. The phase coherence length ($\approx 1.2\mu$m at 280 mK) decreases rapidly only for temperatures higher than the 2-D magnetic ordering in the intercalant layer while it tends to saturate for temperatures lower than the antiferromagnetic ordering between the planes of FeCl${}_3$ molecules providing the first evidence for magnetic ordering in the extreme two-dimensional limit of graphene.

Nano Lett, volume 14, no. 4, pages 1751-1755

References in corpus (6)

• Graphene plasmonics
• Weak localisation magnetoresistance and valley symmetry in graphene
• Raman spectroscopy of epitaxial graphene on a SiC substrate
• Weak localisation in graphene flakes
• Top-gated graphene field-effect-transistors formed by decomposition of SiC
• FeCl3 based Few-Layer Graphene Intercalation Compounds: Single Linear Dispersion Electronic Band Structure and Strong Charge Transfer Doping

Cited by in corpus (6)

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• Performance analysis of photodetectors based on 2D materials and heterostructures
• Atomic-Resolution Visualization and Doping Effects of Complex Structures in Intercalated Bilayer Graphene
• Fluorine Intercalated Graphene: Formation of a 2D Spin Lattice through Pseudoatomization