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Phys Rev Lett. 2014 May 9;112(18):187203. Epub 2014 May 9.

ac current generation in chiral magnetic insulators and Skyrmion motion induced by the spin Seebeck effect.

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Theoretical Division, Los Alamos National Laboratory, Los Alamos, New Mexico 87545, USA.


We show that a temperature gradient induces an ac electric current in multiferroic insulators when the sample is embedded in a circuit. We also show that a thermal gradient can be used to move magnetic Skyrmions in insulating chiral magnets: the induced magnon flow from the hot to the cold region drives the Skyrmions in the opposite direction via a magnonic spin transfer torque. Both results are combined to compute the effect of Skyrmion motion on the ac current generation and demonstrate that Skyrmions in insulators are a promising route for spin caloritronics applications.

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