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Theory of spin effect on Coulomb blockade of single-electron tunneling in ferromagnetic system

G. Michalek, J. Martinek, J. Barnas, B. R. Bulka

cond-mat.mes-hallarXiv:cond-mat/9908196

Abstract

Spin dependent single electron tunneling in a ferromagnetic double junction is investigated theoretically in the limit of incoherent sequential tunneling. The junction consists of a small nonmagnetic metallic grain with discrete energy levels, which is connected to two ferromagnetic electrodes. We have developed a new theoretical model taking into account charge as well as spin degrees of freedom. The model allows us to investigate new phenomena such as spin accumulation and spin fluctuations.

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