Tunnel Magnetoresistance for Phonon-Assisted Tunneling through Quantum Dots |
| W. Rudziński
Department of Physics, Adam Mickiewicz University, Umultowska 85, 61-614 Poznań, Poland |
| Full Text PDF |
| Received: 9 07 2007; |
| Spin-polarized transport through a single-level quantum dot interacting with a local phonon mode is studied in the frame of the nonequilibrium Green-function technique. It is shown that strong electron-phonon interaction gives rise to a significant current suppression, to additional resonance peaks in the differential conductance as well as to oscillations of the tunnel magnetoresistance. Also, a phonon-induced mechanism leading to a minimum in tunnel magnetoresistance at zero bias voltage is explained. |
| DOI: 10.12693/APhysPolA.113.587 PACS numbers: 72.25.Mk, 73.63.Kv, 73.23.Hk |