Spin-dependent transmission of holes through a semiconductor quantum wire with multiple stub |
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| Institution: | 1. Key Laboratory of Materials Physics, Institute of Solid State Physics, Chinese Academy of Sciences, Hefei 230031, China;2. University of Science and Technology of China, Hefei 230026, China;1. Solid State and Structural Chemistry Unit, Indian Institute of Science, Bangalore 560012, India;2. Department of Solid State Physics, Indian Association for the Cultivation of Science, Jadavpur, Kolkata 700032, India |
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| Abstract: | The spin transport of holes through a quantum wire made of many identical T-shaped diluted magnetic semiconductor/semiconductor units is investigated theoretically. The spin-down and spin-up transmission coefficients have been studied as a function of stub parameters. The spin-up transmission coefficient as a function of the stub length is extremely negligible, in the case of multiple-stub quantum wire, while the spin-down transmission coefficient shows a nearly periodic behaviour with regions of large transmission separated by forbidden bands. The spin polarization switches periodically between one and zero as the stub length is changed and shows a square-wave pattern. |
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