Abstract
In this paper, we consider the ballistic charge transport across a ferromagnet(FM)/tunnel barrier(I)/two dimensional electron gas (2DEG)/I/FM structure, where a thin insulating (I) barrier has been interested to overcome the conductivity mismatch problem at the FM-2DEG interface. The Rashba spin-orbit interaction which arises due to a gate-induced structural inversion asymmetry. The combined Rashba interaction and spin-dependent transmission across the barriers give rise to a high degree of spin polarization of current within the 2DEG. The device also exhibits a strong magnetoconductance (Mc) behavior when the relative magnetisation of the FM contacts is switched.
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