Coulomb promotion of spin-dependent tunneling |
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Authors: | Gorelik L Y Kulinich S I Shekhter R I Jonson M Vinokur V M |
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Institution: | Department of Applied Physics, Chalmers University of Technology, SE-412 96 G?teborg, Sweden. |
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Abstract: | We study transport of spin-polarized electrons through a magnetic single-electron transistor (SET) in the presence of an external magnetic field. Assuming the SET to have a nanometer size central island with a single-electron level we find that the interplay on the island between coherent spin-flip dynamics and Coulomb interactions can make the Coulomb correlations promote rather than suppress the current through the device. We find the criteria for this new phenomenon--Coulomb promotion of spin-dependent tunneling--to occur. |
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