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Spin Dependent Transport in Nanodevices: Electronic Correlations and Quantum Interference
B.R. Bulka, S. Lipinski, W. Babiacyk and P. Stefansk

Spin dependent transport through a quantum dot and a molecular system connected to magnetic electrodes is considered. We show that for a single walled carbon nanotube connected with ferromagnetic Ni electrodes the conductance is a superposition of four different channels and it oscillates with the gate voltage, which leads to large oscillations of magnetoresistance. Quantum interference and electronic correlations are studied within an extended single impurity Anderson model, which gives a qualitative agreement with transport measurements through quantum dots strongly coupled to the electrodes. Formation of the Kondo resonance in magnetic nanostructures and an influence of correlations on magnetoresistance are considered as well.

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