Tuning of spin polarization in ferromagnetic resonant tunneling diode by varying delta doping

• GaMnN ferromagnetic resonant tunneling diode, incorporating delta doping is theoretically investigated. A clear spin splitting current is observed when an optimal delta doping concentration is assumed. Compared to non delta doping case, the spin-down polarization can be enhanced 2-3 times at the doping concentration of 7x10(11) cm(-2). In addition, spin-down peak current is also increased similar to 30%. These results demonstrate that delta doping is a flexible and feasible way to tune electron spin polarization.

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magnetotransport

heterostructure

temperature

injection

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