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Spin injection and detection in a ferromagnetic metal/2DEG structure

✍ Scribed by Mark Johnson

Publisher
Elsevier Science
Year
2001
Tongue
English
Weight
138 KB
Volume
10
Category
Article
ISSN
1386-9477

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✦ Synopsis

Spin dependent transport in a high mobility two dimensional electron gas (2DEG) with an asymmetric conΓΏning potential is observed by using a ferromagnetic metal as a spin sensitive voltage probe. A high impedance junction is formed between the ferromagnet and the 2DEG on a planarized sample. The conduction band of the 2DEG is split into spin subbands by the Rashba e ect, and nonequilibrium magnetization is induced by a bias current. The magnetization of the ferromagnet is controlled by an external magnetic ΓΏeld, and the voltage sensed in each of its two magnetic states corresponds to the upand down-spin subband chemical potentials of the 2DEG carriers.

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