Abstract
In this article, the spin filter tunneling in the low biases has been investigated by considering the interfacial barrier roughness. In spite of the approaches that use an artificial periodic interface to find the effects of roughness on transport calculation, our method is based on implementing the height deviation from a mean surface as the roughness characteristics in the transfer matrix method. Moreover the spin-dependent transport properties have been calculated by using the height of a simulated interface in which the rough interface has been grown by ballistic deposition. The results show that the surface roughness suppresses the temperature dependence of spin polarization and reduces the maximum achievable tunneling magnetoresistance and spin-dependent transmission probability.
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