Observation of Plasmarons in Quasi-Freestanding Doped Graphene

Bostwick A, Speck F, Seyller T, Horn K, Polini M, Asgari R, Macdonald AH, Rotenberg E (2010)

Publication Type: Journal article

Publication year: 2010

Journal

Science American Association for the Advancement of Science

Book Volume: 328

Pages Range: 999-1002

Journal Issue: 5981

DOI: 10.1126/science.1186489

Abstract

A hallmark of graphene is its unusual conical band structure that leads to a zero-energy band gap at a single Dirac crossing point. By measuring the spectral function of charge carriers in quasi-freestanding graphene with angle-resolved photoemission spectroscopy, we showed that at finite doping, this well-known linear Dirac spectrum does not provide a full description of the charge-carrying excitations. We observed composite ``plasmaron'' particles, which are bound states of charge carriers with plasmons, the density oscillations of the graphene electron gas. The Dirac crossing point is resolved into three crossings: the first between pure charge bands, the second between pure plasmaron bands, and the third a ring-shaped crossing between charge and plasmaron bands.

Authors with CRIS profile

Florian Speck Lehrstuhl für Laserphysik Thomas Seyller Lehrstuhl für Laserphysik

Additional Organisation(s)

Exzellenz-Cluster Engineering of Advanced Materials

Involved external institutions

Lawrence Berkeley National Laboratory (LBNL) US United States (USA) (US) Fritz-Haber-Institut der Max-Planck-Gesellschaft (FHI) DE Germany (DE) Scuola Normale Superiore di Pisa (SNS) IT Italy (IT) Institute for Research in Fundamental Sciences (IPM) / پژوهشگاه دانش‌های بنیادی IR Iran, Islamic Republic of (IR) University of Texas at Austin US United States (USA) (US)

How to cite

APA:

Bostwick, A., Speck, F., Seyller, T., Horn, K., Polini, M., Asgari, R.,... Rotenberg, E. (2010). Observation of Plasmarons in Quasi-Freestanding Doped Graphene. Science, 328(5981), 999-1002. https://dx.doi.org/10.1126/science.1186489

MLA:

Bostwick, Aaron, et al. "Observation of Plasmarons in Quasi-Freestanding Doped Graphene." Science 328.5981 (2010): 999-1002.

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