Details
| Original language | English |
|---|---|
| Article number | 012001 |
| Journal | Journal of Physics Condensed Matter |
| Volume | 23 |
| Issue number | 1 |
| Publication status | Published - 26 Nov 2010 |
Abstract
The quasiparticle dynamics of the sheet plasmons in epitaxially grown graphene layers on SiC(0001) has been studied systematically as a function of temperature, intrinsic defects, influence of multilayers and carrier density using electron energy loss spectroscopy with high energy and momentum resolution. The opening of an inter-band decay channel appears as an anomalous kink in the plasmon dispersion which we describe as a resonance effect in the formation of electron-hole pairs. Due to the inevitable strong coupling of plasmons with single particle excitations in reduced dimensions, such signatures are generally expected.
ASJC Scopus subject areas
- Materials Science(all)
- General Materials Science
- Physics and Astronomy(all)
- Condensed Matter Physics
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In: Journal of Physics Condensed Matter, Vol. 23, No. 1, 012001, 26.11.2010.
Research output: Contribution to journal › Article › Research › peer review
}
TY - JOUR
T1 - Plasmon electron-hole resonance in epitaxial graphene
AU - Tegenkamp, Christoph
AU - Pfnür, Herbert
AU - Langer, Thomas
AU - Baringhaus, J.
AU - Schumacher, H. W.
PY - 2010/11/26
Y1 - 2010/11/26
N2 - The quasiparticle dynamics of the sheet plasmons in epitaxially grown graphene layers on SiC(0001) has been studied systematically as a function of temperature, intrinsic defects, influence of multilayers and carrier density using electron energy loss spectroscopy with high energy and momentum resolution. The opening of an inter-band decay channel appears as an anomalous kink in the plasmon dispersion which we describe as a resonance effect in the formation of electron-hole pairs. Due to the inevitable strong coupling of plasmons with single particle excitations in reduced dimensions, such signatures are generally expected.
AB - The quasiparticle dynamics of the sheet plasmons in epitaxially grown graphene layers on SiC(0001) has been studied systematically as a function of temperature, intrinsic defects, influence of multilayers and carrier density using electron energy loss spectroscopy with high energy and momentum resolution. The opening of an inter-band decay channel appears as an anomalous kink in the plasmon dispersion which we describe as a resonance effect in the formation of electron-hole pairs. Due to the inevitable strong coupling of plasmons with single particle excitations in reduced dimensions, such signatures are generally expected.
UR - http://www.scopus.com/inward/record.url?scp=78651479420&partnerID=8YFLogxK
U2 - 10.1088/0953-8984/23/1/012001
DO - 10.1088/0953-8984/23/1/012001
M3 - Article
AN - SCOPUS:78651479420
VL - 23
JO - Journal of Physics Condensed Matter
JF - Journal of Physics Condensed Matter
SN - 0953-8984
IS - 1
M1 - 012001
ER -