Spin filtering effect generated by the inter-subband spin-orbit coupling in the bilayer nanowire with the quantum point contact

P Wójcik, J Adamowski - Scientific Reports, 2017 - nature.com
P Wójcik, J Adamowski
Scientific Reports, 2017nature.com
The spin filtering effect in the bilayer nanowire with quantum point contact is investigated
theoretically. We demonstrate the new mechanism of the spin filtering based on the lateral
inter-subband spin-orbit coupling, which for the bilayer nanowires has been reported to be
strong. The proposed spin filtering effect is explained as the joint effect of the Landau-Zener
intersubband transitions caused by the hybridization of states with opposite spin (due to the
lateral Rashba SO interaction) and the confinement of carriers in the quantum point contact …
Abstract
The spin filtering effect in the bilayer nanowire with quantum point contact is investigated theoretically. We demonstrate the new mechanism of the spin filtering based on the lateral inter-subband spin-orbit coupling, which for the bilayer nanowires has been reported to be strong. The proposed spin filtering effect is explained as the joint effect of the Landau-Zener intersubband transitions caused by the hybridization of states with opposite spin (due to the lateral Rashba SO interaction) and the confinement of carriers in the quantum point contact region.
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