By Topic

Coupling Asymmetry Effect on the Coherent Spin Current Through a Ferromagnetic Lead/Quantum Dot/Ferromagnetic Lead System

Sign In

Cookies must be enabled to login.After enabling cookies , please use refresh or reload or ctrl+f5 on the browser for the login options.

Formats Non-Member Member
$31 $13
Learn how you can qualify for the best price for this item!
Become an IEEE Member or Subscribe to
IEEE Xplore for exclusive pricing!
close button

puzzle piece

IEEE membership options for an individual and IEEE Xplore subscriptions for an organization offer the most affordable access to essential journal articles, conference papers, standards, eBooks, and eLearning courses.

Learn more about:

IEEE membership

IEEE Xplore subscriptions

3 Author(s)
Minjie Ma ; Electr. & Comput. Eng. Dept., Nat. Univ. of Singapore, Singapore, Singapore ; Jalil, Mansoor B.A. ; Ghee Tan, Seng

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.

Published in:

Magnetics, IEEE Transactions on  (Volume:46 ,  Issue: 6 )