Y-Shaped Spin Filter in Graphene with Rashba Spin--Orbit Coupling

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概要

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• We propose a graphene Y-shaped spin filter with three zigzag-edged terminals in the presence of the Rashba spin--orbit interaction (RSOI). The three terminal spin-dependent conductances are calculated numerically using the lattice Green function. The results show that the spin polarization is nearly 100% for strong spin--orbit coupling and a suitable Fermi energy. The polarization direction can be tuned by controlling the structure parameters. It is interesting that the conductance of the first channel is heavily suppressed by the edge states localized at the edges of the zigzag ribbon terminals and can be significantly enhanced by Rashba coupling at the junction.

• 2013-07-15

著者

• Chan Kwok

  City University of Hong Kong Shenzhen Research Institute, Shenzhen, People's Republic of China

• Liu Jun-Feng

  Department of Physics, South University of Science and Technology of China, Shenzhen 518055, People's Republic of China

関連論文

• Anomalous Josephson Current through a Ferromagnet-Semiconductor Hybrid Structure
• Y-Shaped Spin Filter in Graphene with Rashba Spin--Orbit Coupling

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