Abstract
The role of magnetic asymmetric inhomogeneities in zigzag graphene nanoribbons is studied within the context of a generalised tight-binding model with mean-field Hubbard-U interaction. Perturbing the magnetic strength along one edge of the ribbon and adjusting the ribbonwidth are shown to tune the spin-conductance and magnetic properties as the uniaxial strain is increased.
We demonstrate the closing of the spin-dependent conductance gap and spin-selective transmission at the Fermi energy for systems with reduced site-specific magnetism along the top-edge of the ribbon. Quantum mechanisms for achieving tunable spin-conductance as a function of strain are revealed as energy minimisation mechanisms in the model. Such mechanisms may be key in the design of future nanoribbon spintronic devices.
We demonstrate the closing of the spin-dependent conductance gap and spin-selective transmission at the Fermi energy for systems with reduced site-specific magnetism along the top-edge of the ribbon. Quantum mechanisms for achieving tunable spin-conductance as a function of strain are revealed as energy minimisation mechanisms in the model. Such mechanisms may be key in the design of future nanoribbon spintronic devices.
| Original language | English |
|---|---|
| Pages (from-to) | 1011-1015 |
| Number of pages | 5 |
| Journal | Physica Status Solidi (c) |
| Volume | 11 |
| Issue number | 5-6 |
| Early online date | 15 Apr 2014 |
| DOIs | |
| Publication status | Published - May 2014 |