Moumita Dey, Santanu K. Maiti, Sreekantha Sil, S. N. Karmakar
Spin dependent transport in a multi-terminal mesoscopic ring is investigated in presence of Rashba and Dresselhaus spin-orbit interactions. Within a tight-binding framework we use a general spin density matrix formalism to evaluate all three components $P_x$, $P_y$ and $P_z$ of outgoing polarization vector which explore the dynamics of the spin polarization vector of current propagating through the system subjected to the Rashba and/or the Dresselhaus spin-orbit couplings. The sensitivity of the polarization components on the electrode-ring interface geometry is discussed in detail. Our present analysis provides a complete description of the coupled spin and electron transport in mesoscopic bridge systems.
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http://arxiv.org/abs/1307.4506
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