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arXiv 2011-10-28 DOI 10.1103/PhysRevLett.107.197201 0 views

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

Naydenova, Ts. · Dürrenfeld, P. · Tavakoli, K. · Pegard, N. · Ebel, L. · Pappert, K. · Brunner, K. · Gould, C. · Molenkamp, L. W.

Original · EN

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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