Theory of spin effect on Coulomb blockade of single-electron tunneling in ferromagnetic system
G. Michalek, J. Martinek, J. Barnas, B. R. Bulka
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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