- Tytuł:
- Current Suppression in Transport Through Triple Quantum Dots Coupled to Ferromagnetic Leads
- Autorzy:
-
Wrześniewski, K.
Weymann, I. - Powiązania:
- https://bibliotekanauki.pl/articles/1386617.pdf
- Data publikacji:
- 2015-02
- Wydawca:
- Polska Akademia Nauk. Instytut Fizyki PAN
- Tematy:
-
73.23.-b
73.21.La
85.75.-d - Opis:
- We consider transport through triple quantum dot system in a triangular geometry weakly coupled to external ferromagnetic leads. The real-time diagrammatic technique in the lowest order perturbation theory is used to calculate the current and Fano factor in the parallel and antiparallel magnetic configuration of the system as well as the resulting tunnel magnetoresistance (TMR). We focus on the transport regime where the current is suppressed and show that it can lead to negative differential conductance and large super-Poissonian shot noise, which are present in both magnetic configurations. Furthermore, we show that for voltages where the system is trapped in a one-particle dark state the TMR becomes suppressed, while for two-particle blockade, the TMR is much enhanced.
- Źródło:
-
Acta Physica Polonica A; 2015, 127, 2; 460-462
0587-4246
1898-794X - Pojawia się w:
- Acta Physica Polonica A
- Dostawca treści:
- Biblioteka Nauki
Artykuł