Spin-polarized two-dimensional electron gas through electrostatic doping inLaAlO3/EuOheterostructures

2010 ◽  
Vol 82 (23) ◽  
Author(s):  
Jaekwang Lee ◽  
Na Sai ◽  
Alexander A. Demkov
Keyword(s):  
Electron Gas ◽  
Two Dimensional ◽  
Dimensional Electron ◽  
Two Dimensional Electron Gas ◽  
Spin Polarized ◽  
Electrostatic Doping ◽  
Dimensional Electron Gas

VOLTAGE-TUNABLE SPIN POLARIZATION OF TWO-DIMENSIONAL ELECTRON GAS IN FERROMAGNETIC/SEMICONDUCTOR HYBRID NANOSYSTEM

2006 ◽  
Vol 13 (05) ◽  
pp. 599-605
Author(s):  
MAOWANG LU
Keyword(s):  
Electron Transport ◽  
Applied Voltage ◽  
Electron Gas ◽  
Two Dimensional ◽  
Dimensional Electron ◽  
Two Dimensional Electron Gas ◽  
Alternative Scheme ◽  
Spin Polarized ◽  
Dimensional Electron Gas ◽  
Hybrid Nanosystem

The spin-dependent electron transport in a two-dimensional electron gas (2DEG) modulated by a stripe of magnetized ferromagnetic metal under an applied voltage was investigated theoretically. It is revealed that highly spin-polarized current can be achieved in this kind of nanosystems. It is also shown that the spin polarity of the electron transport can be switched by adjusting the applied voltage to the stripe in the device. These interesting properties may provide an alternative scheme to spin polarize electrons into semiconductors, and this device may be used as a voltage-tunable spin filter.

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