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13 papers
InN dielectric function from the midinfrared to the visible range
L. A. Falkovsky
The dispersion of the dielectric function for wurtzite InN is analytically evaluated in the region near the fundamental energy gap. The real part of the dielectric function has a l…
Optical properties of graphene
L. A. Falkovsky
Reflectance and transmittance of graphene in the optical region are analyzed as a function of frequency, temperature, and carrier density. We show that the optical graphene propert…
Symmetry constraints on phonon dispersion in graphene
L. A. Falkovsky
Taking into account the constraints imposed by the lattice symmetry, we calculate the phonon dispersion for graphene with interactions between the first, second, and third nearest…
Optical far-infrared properties of graphene monolayer and multilayers
L. A. Falkovsky
We analyze the features of the graphene mono- and multilayer reflectance in the far-infrared region as a function of frequency, temperature, and carrier density taking the intraban…
Loschmidt echo and stochastic-like quantum dynamics of nano-particles
V. A. Benderskii, L. A. Falkovsky, E. I. Kats
We investigate time evolution of prepared vibrational state (system) coupled to a reservoir with dense spectrum of its vibrational states. We assume that the reservoir has an equid…
Phonon dispersion in graphene
L. A. Falkovsky
Taking into account the constraints imposed by the lattice symmetry, the phonon dispersion is calculated for graphene with interactions between the first and second nearest neighbo…