چكيده به لاتين
Abstract
In this thesis, the electronic and spintronic properties of 48-atoms Phosphorene quantum Nano ring with zigzag and armchair edges are investigated. The energy spectrum, persistent current and magneto susceptibility of 48-atoms Phosphorene quantum Nano ring (with zigzag and armchair edges) in the presence and absence of Rashba effect are studied. using Green's function method in Tight binding model, the spin polarization of output current have been investigated numerically in phosphorene quantum Nano Ring (with zigzag and armchair edges) connected to two semi-finite ideal linear leads. The results show that by controlling the flux passing through the center of ring and tuning the electric field, it is possible to determine the spin polarization of output current, the system (phosphorene quantum Nano Ring with zigzag and armchair edges) can works not only as spin filter for Non-¬polarized input current, but also (phosphorene quantum Nano Ring with zigzag edges) as spin inverter for polarized input current. Spin dependent transmission coefficient, spin currents and spin polarization are calculated in ideal cases. This research has many applications in spintronic, spin memories and quantum computers.
Keywords: quantum Nano rings, spintronic, Green's function method, spin filter, spin inverter.
