Spin-polarized current in double quantum dots |
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| Authors: | Li Ai-Xian a and Duan Su-Qing |
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| Affiliation: | Li Ai-Xian a) and Duan Su-Qing b) a) Graduate School of China Academy of Engineering Physics,Beijing 100088,China b) Institute of Applied Physics and Computational Mathematics,Beijing 100088,China |
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| Abstract: | We analyze the transport through asymmetric double quantum dots with an inhomogeneous Zeeman splitting in the presence of crossed dc and ac magnetic fields.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. |
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| Keywords: | resonant tunnelling spin-polarized current spin filter double quantum dots |
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