چكيده به لاتين
In this thesis, the electrical conduction and spin polarization in graphene and silicene multiterminal devices were studied using a tight-binding model and non-equilibrium Green’s function method, and the of Landauer Buttiker formalism. The change in the width of the leads was effective in observing zero transmission in the armchair semiconductor leads. Also, the effect of ferromagnetic field and vertical electric field on devices based silicene was investigated.
The advantage of multiterminal devices in comparison with nanoribbons is the creation of a band gap and the possibility of controlling the current.
In multiterminal devices, a dip is observed in the conductance of armchair nanoribbon and correspondingly a peak in the conductance of zigzag nanoribbon.
In the case of silicene multiterminal devices, the spin polarization of 100% near the Fermi energy can be found in the armachair semiconductor leads. Therefore, the silicene multiterminal device can act as a spin filter.
Keywords: Hamiltonian Tight-binding, Non- equilibrium Green's Function, Landauer Buttiker, Spin Polarization, Multiterminal Devices
