Spin-Dependent Transport in Carbon Nanotubes with Chromium Atoms

Abstract

Method is developed for self-consistent calculation of the energy spectrum of free energy and electrical disordered crystals. Processes of electron scattering on the ionic core potential of different sort, fluctuations of charge, spin density and lattice vibrations are taken into account. Electronic states of the system are described using tight binding multiband model. The nature of the spin-dependent electron transport of carbon nanotubes with chromium atoms adsorbed on the surface is explained. The value of the spin polarization of electron transport is determined by the difference of the partial densities of states of electrons with opposite spin projection at the Fermi level and the difference between the relaxation times of electron states. The value of the spin polarization of the electric current increases with increasing of Cr atoms concentration and magnitude of the external magnetic field.

Energy spectrum of graphene with adsorbed potassium atoms

“…The dependence of the energy of an electron on the wave vector for graphene is calculated from the equation for Green's function poles for the electron subsystem [6][7][8][9][10] :…”

Influence of the Adsorbed Atoms of Potassium on an Energy Spectrum of Graphene

“…Залежність енергії електрона від хвильового вектора для графену розраховується з рівняння для полюсів Ґрінової функції електрон-ної підсистеми [7,8]:…”