TITLE:
Spin-Dependent Transport in Carbon Nanotubes with Chromium Atoms
AUTHORS:
Stanislav P. Repetsky, Oleg V. Tretyak, Iryna G. Vyshivanaya, Dmitriy K. Cheshkovskiy
KEYWORDS:
Spin-Dependent Transport, Carbon Nanotubes with Chromium Atoms, Tight Binding Model, Localized Magnetic Moment, Free Energy, Electrical Conductivity Tensor
JOURNAL NAME:
Journal of Modern Physics,
Vol.5 No.17,
November
25,
2014
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.