Noise-based approximation to thermal spin-injection in Fe/GaAs

We analyze the prospects for thermal spin-injection from iron into gallium arsenide via the application of electrical noise. By estimating the applied effective temperature-equivalent gradients, we characterize the magnitude of any electrical part of the thermal spin-injection efficiency or the spin...

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Veröffentlicht in:Applied physics letters 2017-10, Vol.111 (14)
Hauptverfasser: Wagner, T., Haigh, J. A., Olejník, K., Irvine, A. C., Novák, V., Wunderlich, J.
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Sprache:eng
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Zusammenfassung:We analyze the prospects for thermal spin-injection from iron into gallium arsenide via the application of electrical noise. By estimating the applied effective temperature-equivalent gradients, we characterize the magnitude of any electrical part of the thermal spin-injection efficiency or the spin-dependent Seebeck effect. The magnitude of the non-local spin signal associated with this effect suggests that temperature differences on the order of ∼100 K would be needed for true thermal spin-injection experiments. The large size of the effective temperature gradients induced by the noise-based method means that even very small thermo-electric effects can be quantified.
ISSN:0003-6951
1077-3118
DOI:10.1063/1.4985537