Spin separation in digital ferromagnetic heterostructures

Details Spin separation in digital ferromagnetic heterostructures Spin separation in digital ferromagnetic heterostructures

2002-01-18

arxiv.org/abs/cond-mat/0201326v1

Physical Review B66, 073312 (2002)

Physics

Condensed Matter

Mesoscale and Nanoscale Physics

4 pages, 3 figures. Submitted to Phys. Rev. B

Scientific paper

10.1103/PhysRevB.66.073312

In a study of the ferromagnetic phase of a multilayer digital ferromagnetic semiconductor in the mean-field and effective-mass approximations, we find the exchange interaction to have the dominant energy scale of the problem, effectively controlling the spatial distribution of the carrier spins in the digital ferromagnetic heterostructures. In the ferromagnetic phase, the majority and minority carriers tend to be in different regions of the space (spin separation). Hence, the charge distribution of carriers also changes noticeably from the ferromagnetic to the paramagnetic phase. An example of a design to exploit these phenomena is given.

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