“School of Nano-Sciences”
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| Paper IPM / Nano-Sciences / 8149 |
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| Abstract: | |||||
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We investigate the spin-flip effect on electronic transport in a nanostructure composed of two nonmagnetic (NM) leads separated by a periodic
spacer. The spacer is composed of one-dimensional heterostructure formed by a sequence of magnetic (A) and nonmagnetic (B) sites periodically
juxtaposed (as in a typical periodic quantum dot (QD)). The calculations are based on the tight-binding model and transfer matrix method, which
compute the current?voltage characteristic within the Landauer?Bu�ttiker formalism. Our main goal is to assess the contribution of the spin-flip
scattering to the transport properties of such systems. The spin-dependent transport behavior can be controlled via a gate magnetic field and an
applied voltage in the ballistic regime. Our results show that the conductance strongly depends on the configurations of the magnetic QD. The
application of the predicted results may be useful in designing spin-valve devices, such as spin-polarized molecular transistors.
q 2006 Elsevier Ltd. All rights reserved.
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