1. Spin-polarized current in double quantum dots.
- Author
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Li Ai-Xian and Duan Su-Qing
- Subjects
- *
QUANTUM dots , *TRANSPORT theory , *ELECTRON paramagnetic resonance , *DIRECT currents , *ALTERNATING currents , *MAGNETIC fields - Abstract
We analyze the transport through asymmetric double quantum dots with an inhomogeneous Zeeman splitting in the presence of crossed dc and ac magnetic elds. A strong spin-polarized current can be obtained by changing the dc magnetic field. It is mainly due to the resonant tunnelling. But for the ferromagnetic right electrode, the electron spin resonance also plays an important role in transport. We show that the double quantum dots with three-level mixing under crossed dc and ac magnetic fields can act not only as a bipolar spin filter but also as a spin inverter under suitable conditions. [ABSTRACT FROM AUTHOR]
- Published
- 2012
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