Volume 73, Number 5, March 2006
|Page(s)||786 - 792|
|Section||Condensed matter: electronic structure, electrical, magnetic, and optical properties|
|Published online||25 January 2006|
Spin-polarized hole transport through a diluted magnetic semiconductor heterostructure with magnetic-field modulations
The American College - Madurai-625 002, India
2 School of Physics, Madurai-Kamaraj University - Madurai-625 021, India
Corresponding authors: firstname.lastname@example.org email@example.com
Accepted: 10 January 2006
We investigate the spin-polarized transport of holes in symmetric and asymmetric diluted magnetic semiconductor heterostructures of CdTe/CdMnxTe 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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