Observation of carrier-density-dependent many-body effects in graphene via tunneling spectroscopy.
نویسندگان
چکیده
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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عنوان ژورنال:
- Physical review letters
دوره 104 3 شماره
صفحات -
تاریخ انتشار 2010