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Updated: Jun 14, 2026

Fabrication of Gate-tunable Graphene Devices for Scanning Tunneling Microscopy Studies with Coulomb Impurities
Published on: July 24, 2015
Observation of carrier-density-dependent many-body effects in graphene via tunneling spectroscopy
Victor W Brar1, Sebastian Wickenburg, Melissa Panlasigui
1Department of Physics, University of California at Berkeley, Berkeley, California 94720, USA.
Abstract:
We find the scanning tunneling spectra of backgated graphene monolayers to be significantly altered by many-body excitations. Experimental features in the spectra arising from electron-plasmon interactions show carrier density dependence, distinguishing them from density-independent electron-phonon features. Using a straightforward model, we are able to calculate theoretical tunneling spectra that agree well with our data, providing insight into the effects of many-body interactions on the lifetime of graphene quasiparticles.
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