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Spin-seebeck effect: a phonon driven spin distribution
Authors:Jaworski C M  Yang J  Mack S  Awschalom D D  Myers R C  Heremans J P
Institution:Department of Mechanical Engineering, The Ohio State University, Columbus, 43210, USA.
Abstract:Here we report on measurements of the spin-Seebeck effect in GaMnAs over an extended temperature range alongside the thermal conductivity, specific heat, magnetization, and thermoelectric power. The amplitude of the spin-Seebeck effect in GaMnAs scales with the thermal conductivity of the GaAs substrate and the phonon-drag contribution to the thermoelectric power of the GaMnAs, demonstrating that phonons drive the spin redistribution. A phenomenological model involving phonon-magnon drag explains the spatial and temperature dependence of the measured spin distribution.
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