| Issue |
Europhys. Lett.
Volume 73, Number 5, March 2006
|
|
|---|---|---|
| Page(s) | 786 - 792 | |
| Section | Condensed matter: electronic structure, electrical, magnetic, and optical properties | |
| DOI | https://doi.org/10.1209/epl/i2005-10456-8 | |
| Published online | 25 January 2006 | |
Spin-polarized hole transport through a diluted magnetic semiconductor heterostructure with magnetic-field modulations
1
The American College - Madurai-625 002, India
2
School of Physics, Madurai-Kamaraj University - Madurai-625 021, India
Corresponding authors: kgnnskr@yahoo.com drknk2003@yahoo.co.in
Received:
25
October
2005
Accepted:
10
January
2006
We investigate the spin-polarized transport of holes in symmetric and
asymmetric diluted magnetic semiconductor heterostructures of
CdTe/Cd
MnxTe under local magnetic-field modulations. The effect
of a type-I–to–type-II transition in the CdTe/CdMnxTe heterostructure is also used in our model. The
spatially modulated magnetic field provides us with a new degree of freedom to
control the degree of spin-polarized transport of holes. Our investigations
show that spin-polarized transport of holes reaches 100% polarization
with modulated weak magnetic field. This could be suitably engineered in the
fabrication of perfect magnetic semiconductor spin-filters.
PACS: 75.50.Pp – Magnetic semiconductors / 72.25.-b – Spin polarized transport / 73.40.Gk – Tunneling
© EDP Sciences, 2006
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