Spin-Caloritronic Batteries

Xiao-Qin Yu, Zhen-Gang Zhu, Gang Su, Antti-Pekka Jauho

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The thermoelectric performance of a topological energy converter is analyzed. The H-shaped device is based on a combination of transverse topological effects involving the spin: the inverse spin Hall effect and the spin Nernst effect. The device can convert a temperature drop in one arm into an electric power output in the other arm. Analytical expressions for the output voltage, the figure of merit (ZT), and energy-converting efficiency are reported. We show that the output voltage and the ZT can be tuned by the geometry of the device and the physical properties of the material. Importantly, contrary to a conventional thermoelectric device, here a low electric conductivity may, in fact, enhance the ZT value, thereby opening a path to strategies in optimizing the figure of merit.
Original languageEnglish
Article number054038
JournalPhysical Review Applied
Issue number5
Number of pages12
Publication statusPublished - 2017

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