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Highly tunable charge and spin transport in silicene junctions: phase transitions and half-metallic states
Maryam Mahdavifar1, Farhad Khoeini1
1Department of Physics, University of Zanjan, PO Box 45195-313, Zanjan, Iran.
Abstract:
We report peculiar charge and spin transport properties in S-shaped silicene junctions with the Kane-Mele tight-binding model. In this work, we investigate the effects of electric and exchange fields on the charge and spin transport properties. Our results show that by applying a perpendicular electric field, metal-semiconductor and also semimetal-semiconductor phase transitions occur in our systems. Furthermore, full spin current can be obtained in the structures, so the half-metallic states are observable. Our results enable us to control charge and spin currents and provide new opportunities and applications in silicene-based electronics, optoelectronics, and spintronics.
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