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Journal of Nanoscience Letters 2014, 4: 9
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Research Article
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Magnetic-non-magnetic superlattice chain with external electric field: Spin transport and the selective switching effect
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Moumita Deya, Santanu K. Maitib, S. N. Karmakara
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a Theoretical Condensed Matter Physics Division, Saha Institute of Nuclear Physics, Sector-I, Block-AF, Bidhannagar, Kolkata-700 064, India
b Physics and Applied Mathematics Unit, Indian Statistical Institute,
203 Barrackpore Trunk Road, Kolkata-700 108, India
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Abstract |
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Based on Green’s function formalism, the existence of multiple mobility edges in a one-dimensional magnetic-non-magnetic superlattice geometry in presence of external electric field is predicted, and, it leads to the possibility of getting a metal-insulator transition at multiple values of Fermi energy. The role of electric field on electron localization is discussed for different arrangements of magnetic and non-magnetic atomic sites in the chain. We also analyze that the model quantum system can be used as a perfect spin filter for a wide range of energy.
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Keywords |
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Mobility edge; 1D superlattice geometry; Green's function approach; Mesoscale switch; Spin filter
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