Efficient spin filtering in a disordered semiconductor superlattice in the presence of Dresselhaus spin-orbit coupling |
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Authors: | Mohammad Reza Khayatzadeh Mahani Edris Faizabadi |
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Institution: | a Department of Physics, Faculty of Science, KNT University of Technology, PO Box 15875-4416, Tehran, Iran b Department of Physics, Iran University of Science and Technology, Narmak, Tehran 16844, Iran |
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Abstract: | The influence of the Dresselhaus spin-orbit coupling on spin polarization by tunneling through a disordered semiconductor superlattice was investigated. The Dresselhaus spin-orbit coupling causes the spin polarization of the electron due to transmission possibilities difference between spin up and spin down electrons. The electron tunneling through a zinc-blende semiconductor superlattice with InAs and GaAs layers and two variable distance InxGa(1−x)As impurity layers was studied. One hundred percent spin polarization was obtained by optimizing the distance between two impurity layers and impurity percent in disordered layers in the presence of Dresselhaus spin-orbit coupling. In addition, the electron transmission probability through the mentioned superlattice is too much near to one and an efficient spin filtering was recommended. |
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Keywords: | 85 75 -d 67 57 Lm 72 25 Dc 71 70 Ej |
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