Physics – Condensed Matter – Mesoscale and Nanoscale Physics
Scientific paper
2010-12-28
Physics
Condensed Matter
Mesoscale and Nanoscale Physics
Scientific paper
In this paper, we calculated the dielectric function, the loss function, the magnetoplasmon dispersion relation and the temperature-induced transitions for graphene in a uniform perpendicular magnetic field B. The calculations were performed using the Peierls tight-binding model to obtain the energy band structure and the random-phase approximation to determine the collective plasma excitation spectrum. The single-particle and collective excitations have been precisely identified based on the resonant peaks in the loss function. The critical wave vector at which plasmon damping takes place is clearly established. This critical wave vector depends on the magnetic field strength as well as the levels between which the transition takes place. The temperature effects were also investigated. At finite temperature, there are plasma resonances induced by the Fermi distribution function. Whether such plasmons exist is mainly determined by the field strength, temperature, and momentum. The inelastic light scattering spectroscopies could be used to verify the magnetic field and temperature induced plasmons.
Chen Szu-Chao
Gumbs Godfrey
Lin Ming-Fa
Roslyak Oleksiy
Wu Jhao-Ying
No associations
LandOfFree
Plasma Excitations in Graphene: Their Spectral Intensity and Temperature Dependence in Magnetic Field does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.
If you have personal experience with Plasma Excitations in Graphene: Their Spectral Intensity and Temperature Dependence in Magnetic Field, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Plasma Excitations in Graphene: Their Spectral Intensity and Temperature Dependence in Magnetic Field will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-428007