Fig. 1.
Schematic of a two-terminal thermospin device, which consists of two normal conducting leads and a Rashba ring threaded by a magnetic flux. 279×361 mm2 (300×300 DPI2).
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Feng Liang, Benling Gao, Yu Gu. Magnetic flux assisted thermospin transport in a Rashba ring[J]. Journal of Semiconductors, 2016, 37(10): 102003. doi: 10.1088/1674-4926/37/10/102003
F Liang, B L Gao, Y Gu. Magnetic flux assisted thermospin transport in a Rashba ring[J]. J. Semicond., 2016, 37(10): 102003. doi: 10.1088/1674-4926/37/10/102003.
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Magnetic flux assisted thermospin transport in a Rashba ring
doi: 10.1088/1674-4926/37/10/102003
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Abstract
The electron transport through a Rashba ring with a magnetic flux and driven by a temperature difference is investigated. It is found that the spin interference effect induced by the Rashba spin-orbit interaction and by the magnetic flux can break the balance between the spin-up and spin-down component currents in the thermally driven charge current and thus result in a spin current. The analytical derivation and numerical calculations reveal that the magnitude, sign, peaks and spin-polarization of the generated spin current can be readily modulated by the system parameters. In particular, with some choices of the parameters, the spin polarization of the generated spin current can reach 100%, that is, a fully spin-polarized thermospin current can be produced. These results may help the use of the spin-dependent Seebeck effect to generate and manipulate a spin current.-
Keywords:
- spin current,
- Seebeck effect,
- Rashba ring
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References
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