中国物理快报：英文版, 2017, Vol.34 (8), p.121-124
2017
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- Autor(en) / Beteiligte
- Titel
- CONDENSED MATTER： ELECTRONIC STRUCTURE, ELECTRICAL, MAGNETIC, AND OPTICAL PROPERTIES
- Ist Teil von
- 中国物理快报：英文版, 2017, Vol.34 (8), p.121-124
- Erscheinungsjahr
- 2017
- Quelle
- Alma/SFX Local Collection
- Beschreibungen/Notizen
- Using the non-equilibrium Keldysh Green＇s function technique, we investigate electron transport properties of a system consisting of multiple three-quantum-dot rings. The conductance as a function of the electron energy is numerically calculated. An antiresonance point emerges in the conductance spectra and evolves into a well-defined insulating band with the increasing number of three-quantum-dot rings. The position of the well-defined insulating band can be modulated by varying the tunneling coupling strength between adjacent three-quantum-dot rings. When an external magnetic flux is introduced, several to 100% spin-polarized windows will occur due to the Zeeman splitting. These results strongly suggest that this device may realize multiple functions including quantum switch and efficient spin filtering.