Spin separation in digital ferromagnetic heterostructures -: art. no. 073312

被引:12
作者
Fernández-Rossier, J [1 ]
Sham, LJ [1 ]
机构
[1] Univ Calif San Diego, Dept Phys, La Jolla, CA 92093 USA
基金
美国国家科学基金会;
关键词
D O I
10.1103/PhysRevB.66.073312
中图分类号
T [工业技术];
学科分类号
08 ;
摘要
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-spin and minority-spin 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 here.
引用
收藏
页码:733121 / 733124
页数:4
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