Probing electronic excitations in mono- to pentalayer graphene by micro-magneto-Raman spectroscopy

Abstract

We probe electronic excitations between Landau levels in freestanding $N-$layer graphene over a broad energy range, with unprecedented spectral and spatial resolution, using micro-magneto Raman scattering spectroscopy. A characteristic evolution of electronic bands in up to five Bernal-stacked graphene layers is evidenced and shown to remarkably follow a simple theoretical approach, based on an effective bilayer model. $(N>3)$-layer graphene appear as appealing candidates in the quest for novel phenomena, particularly in the quantum Hall effect regime. Our work paves the way towards minimally-invasive investigations of magneto-excitons in other emerging low-dimensional systems, with a spatial resolution down to 1$\mu$m.

to appear in Nano Letters

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Cited by in corpus (12)

• Landau level spectroscopy of electron-electron interactions in graphene
• Insulating state in tetralayers reveals an even-odd interaction effect in multilayer graphene
• Experimental observation of ABCB stacked tetralayer graphene
• Interaction-induced insulating state in thick multilayer graphene
• Electronic Raman Scattering in Twistronic Few-Layer Graphene
• Inter-subband Landau level couplings induced by in-plane magnetic fields in trilayer graphene
• Many-body effects of Coulomb interaction on Landau levels in graphene
• Spatially resolved optical spectroscopy in extreme environment of low temperature, high magnetic fields and high pressure
• The diverse magneto-optical selection rules in bilayer black phosphorus
• Landau level spectroscopy in current solid state physics
• Ultra-low doping and local charge variation in graphene measured by Raman: experiment and simulation
• Many-body effects in suspended graphene probed through magneto-phonon resonances