Diffusion thermopower of (Ga,Mn)As/GaAs tunnel junctions

Details Diffusion thermopower of (Ga,Mn)As/GaAs tunnel junctions Diffusion thermopower of (Ga,Mn)As/GaAs tunnel junctions

2011-10-28

arxiv.org/abs/1110.6339v1

Physics

Condensed Matter

Mesoscale and Nanoscale Physics

Scientific paper

We report the observation of tunneling anisotropic magnetothermopower, a voltage response to a temperature difference across an interface between a normal and a magnetic semiconductor. The resulting voltage is related to the energy derivative of the density of states in the magnetic material, and thus has a strongly anisotropic response to the direction of magnetization in the material. The effect will have relevance to the operation of semiconductor spintronic devices, and may indeed already play a role in correctly interpreting the details of some earlier spin injection studies.

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