The Influence of Assisted Hopping Process on the Transport Properties of Quantum Dot with Ferromagnetic Leads |
| G. Górski, K. Kucab
Faculty of Mathematics and Natural Sciences, University of Rzeszów, S. Pigonia 1, 35-310 Rzeszów, Poland |
| Full Text PDF |
| We study the transport properties of a quantum dot coupled to ferromagnetic leads with occupancy dependent hybridization. Using the modified equation of motion approach and modified perturbation theory we show that the assisted hopping processes can be the mechanism which is responsible for the generation of plateau in the linear conductance. This process breaks the particle-hole symmetry for conductance and magnetization. Moreover, the assisted hopping processes combined with the spin polarization cause the change of thermoelectric transport characteristics such as thermopower, the heat conductance and the figure of merit. |
DOI:10.12693/APhysPolA.135.85 PACS numbers: 72.10.Fk, 72.15.Qm, 73.63.Kv |