Andrew L. Walter

Giant Faraday rotation in single- and multilayer graphene

The rotation of polarized light in certain materials when subject to a magnetic field is known as the Faraday effect. Remarkably, just one atomic layer of graphene exhibits Faraday rotations that would only be measurable in other materials many hundreds of micrometres thick.

Intrinsic Terahertz Plasmons and Magnetoplasmons in Large Scale Monolayer Graphene

We show that in graphene epitaxially grown on SiC the Drude absorption is transformed into a strong terahertz plasmonic peak due to natural nanoscale inhomogeneities, such as substrate terraces and wrinkles. The excitation of the plasmon modifies dramatically the magneto-optical response and in particular the Faraday rotation. This makes graphene a unique playground for plasmon-controlled magneto-optical phenomena thanks to a cyclotron mass 2 orders of magnitude smaller than in conventional plasmonic materials such as noble metals.

Electronic structure of graphene on single-crystal copper substrates

The electronic structure of graphene on Cu(111) and Cu(100) single crystals is investigated using low energy electron microscopy, low energy electron diffraction and angle resolved photoemission spectroscopy. On both substrates the graphene is rotationally disordered and interactions between the graphene and substrate lead to a shift in the Dirac crossing of

Highly p-doped epitaxial graphene obtained by fluorine intercalation

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Coexisting massive and massless Dirac fermions in symmetry-broken bilayer graphene

-0.3 eV and the opening of a

Growth from Below: Graphene Bilayers on Ir(111)

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Extraordinary epitaxial alignment of graphene islands on Au(111)

250 meV gap. Exposure of the samples to air resulted in intercalation of oxygen under the graphene on Cu(100), which formed a (

Multicomponent magneto-optical conductivity of multilayer graphene on SiC

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Visualizing atomic-scale negative differential resistance in bilayer graphene

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Electronic instability in a zero-gap semiconductor: the charge-density wave in (TaSe4)2I.

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