Abstract
A multi-channel tunneling theory through a realistic hetero-junction barrier was developed using a mixed representation and studied within a few modes model. The transfer-matrix technique was employed to calculate spin-polarized transmission and reflection amplitudes between Bloch states in the semi-infinite leads. The transmission coefficients were used in Fisher and Lee’s formula for conductance. The multi-tunneling theory was applied within a real Fe/MgO/Fe hetero-junction barrier.
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