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Observation of Carrier-Density-Dependent Many-Body Effects in Graphene via Tunneling Spectroscopy

Cited 104 time in Web of Science Cited 108 time in Scopus
Authors

Brar, Victor W.; Wickenburg, Sebastian; Panlasigui, Melissa; Park, Cheol-Hwan; Wehling, Tim O.; Zhang, Yuanbo; Decker, Régis; Girit, Çaǧlar; Balatsky, Alexander V.; Louie, Steven G.; Zettl, Alex; Crommie, Michael F.

Issue Date
2010-01
Publisher
American Physical Society
Citation
Physical Review Letters, Vol.104 No.3, p. 036805
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. © 2010 The American Physical Society.
ISSN
0031-9007
URI
https://hdl.handle.net/10371/202367
DOI
https://doi.org/10.1103/PhysRevLett.104.036805
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  • College of Natural Sciences
  • Department of Physics and Astronomy
Research Area Condensed Matter Physics, Nanoscale Photonics, Nanoscale Physics, 나노 물리와 나노 광자학, 응집 물질 물리

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