Please use this identifier to cite or link to this item: https://doi.org/10.1109/TMAG.2010.2045350
Title: Coupling asymmetry effect on the coherent spin current through a ferromagnetic lead/quantum dot/ferromagnetic lead system
Authors: Ma, M. 
Jalil, M.B.A. 
Tan, S.G.
Keywords: Equation of motion method
Non-equilibrium Green?s function
Quantum dot
Spin-flip
Issue Date: Jun-2010
Source: Ma, M., Jalil, M.B.A., Tan, S.G. (2010-06). Coupling asymmetry effect on the coherent spin current through a ferromagnetic lead/quantum dot/ferromagnetic lead system. IEEE Transactions on Magnetics 46 (6) : 1495-1498. ScholarBank@NUS Repository. https://doi.org/10.1109/TMAG.2010.2045350
Abstract: The spin dependent transport through asymmetric double barrier magnetic tunnel junction system is theoretically studied, based on the non-equilibrium Green's function obtained via the equation of motion method. In the system, a single energy level is considered in the semiconductor quantum dot, which is asymmetrically coupled to the left and the right leads. It is found that due to the asymmetric coupling, the threshold voltages for charge current I-V characteristics are different for positive and negative applied bias, so are the spin current I-V characteristics. Besides, it is also found that the direction of current flow also modifies the electron occupancy within the dot. © 2006 IEEE.
Source Title: IEEE Transactions on Magnetics
URI: http://scholarbank.nus.edu.sg/handle/10635/51128
ISSN: 00189464
DOI: 10.1109/TMAG.2010.2045350
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