Spin-filtering effect in a two-dimensional electron gas under a local fringe field

2007 ◽  
Vol 204 (12) ◽  
pp. 3958-3961 ◽  
Author(s):  
Seon-Gu Huh ◽  
Jonghwa Eom ◽  
Hyun Cheol Koo ◽  
Hyung-jun Kim ◽  
Joonyeon Chang ◽  
...  
Keyword(s):  
Electron Gas ◽  
Fringe Field ◽  
Two Dimensional ◽  
Dimensional Electron ◽  
Two Dimensional Electron Gas ◽  
Dimensional Electron Gas ◽  
Filtering Effect ◽  
Spin Filtering

SPIN INJECTION INTO TWO-DIMENSIONAL ELECTRON GAS THROUGH A SPIN-FILTERING INJECTOR

2008 ◽  
Vol 22 (16) ◽  
pp. 1535-1545
Author(s):  
Y. WANG ◽  
A. P. LIU ◽  
J. BAO ◽  
X. G. XU ◽  
Y. JIANG
Keyword(s):  
Spin Polarization ◽  
Spin Injection ◽  
Electron Gas ◽  
Hybrid Structure ◽  
Two Dimensional ◽  
Dimensional Electron ◽  
Two Dimensional Electron Gas ◽  
Tunneling Model ◽  
Dimensional Electron Gas ◽  
Spin Filtering

In this paper, large spin polarization and magnetoconductance in a ferromagnet (FM)/ferromagnetic insulator (FI)/two-dimensional electron gas (2DEG)/non-magnetic insulator (I)/FM hybrid structure are theoretically predicted by introducing a spin-filtering injector. In the framework of coherent tunneling model, the electron transmission probability, spin polarization and magnetoconductance in the hybrid structure all oscillate with the electron density within the 2DEG channel. A complete single-mode spin injection would be realized by designing a well-defined geometry to adjust the competition between the spin-dependent tunneling of the conductive electrons and spin-filtering effect of the FI barrier.

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