Author： Tegenkamp C Pfnür H Langer T Baringhaus J Schumacher H W
Publisher： IOP Publishing
ISSN： 0953-8984
Source： Journal of Physics: Condensed Matter, Vol.23, Iss.1, 2011-01, pp. : 12001-12005
Disclaimer: Any content in publications that violate the sovereignty, the constitution or regulations of the PRC is not accepted or approved by CNPIEC.
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.
Related content
Manipulation of plasmon electron–hole coupling in quasi-free-standing epitaxial graphene layers
New Journal of Physics, Vol. 14, Iss. 10, 2012-10 ,pp. :
Access to resources
Recommend
Access to resources
Electron–hole coexistence in disordered graphene probed by high-field magneto-transport
New Journal of Physics, Vol. 12, Iss. 8, 2010-08 ,pp. :