Spin-flip transport in one-dimensional comb-like waveguide |
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Authors: | Li-guo Wang You-li Huang |
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Institution: | aCollege of Science, Shenyang University, Shenyang 110044, China |
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Abstract: | The spin-flip transport of electron in one-dimensional comb-like waveguide structures is investigated theoretically including the Rashba and Dresselhaus effects. The spin-polarized transmission of electron oscillates with changing the length of stubs and/or electronic momentum, and depends sensitively on electron spin orientation injected from the ferromagnetic source. The spin-flip transmission induced by the Rashba and Dresselhaus effects can only be up to 25% in the case of one stub, and can be enhanced significantly by adding more stubs. The spin-flip transmission induced by the Dresselhaus effect is similar to what induced by the Rashba effect for the one stub case, but is quite different for multi-stub case. The interplay between the Rashba and Dresselhaus effects shortens the period of transmission oscillation and enhances the splitting of the transmission peaks. |
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Keywords: | Spin-polarized transport Quantum waveguide theory Stub |
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