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Electrical Spin Injection: Spin-Polarized Transport from Magnetic into Non-Magnetic Semiconductors

Chapter
Part of the NanoScience and Technology book series (NANO)

Abstract

Spin polarized transport in semiconductors presently attracts a great deal of interest. For the past five years or so, several research groups have tried to achieve efficient injection of spin polarized electrons into non-magnetic semiconductors using ferromagnetic metals as spin injecting contacts. All these experiments have failed to produce conclusive results; the reasons for this lack of success were outlined in Chap. 2 and in [1]. The main outcome of the theory for spin injection given in Chap. 2 is that the spin polarization a in the semiconductor is simply not proportional to the bulk spin polarization β in the ferromagnet. This is mainly due to the different conductivities of semiconductor (σ sc ) and ferromagnet (σ fm ) and to the short spin scattering length λ fm in the ferromagnet.

Keywords

Spin Polarization Circular Polarization Heavy Hole Zeeman Splitting Magnetic Circular Dichroism 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

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