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arXiv · 1308.3414

Theoretical expectation of large Seebeck effect in PtAs$_2$ and PtP$_2$

Kouta Mori·Hidetomo Usui·Hirofumi Sakakibara·Kazuhiko Kuroki
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Abstract

Motivated by a recent observation of good thermoelectric properties in %a %pyrite material PtSb$_2$, we theoretically study related pyrites %materials in an attempt to %find a %better thermoelectric material. %Our aim is to seek for a material which overcomes the suppression of the Seebeck coefficient at high temperatures.% in PtSb$_2$. We find that PtAs$_2$ and PtP$_2$ are good candidates, where a larger band gap than in PtSb$_2$ combined with the overall flatness of the band top gives rise to a monotonically increasing Seebeck coefficient up to high temperatures. This expectation has been confirmed quite recently for hole doped PtAs$_2$, where a very large power factor of $\sim$ 65$μ$W/cmK$^2$ at T=440 K is observed.

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Kouta Mori, Hidetomo Usui, Hirofumi Sakakibara, Kazuhiko Kuroki. 2013-08-15. Theoretical expectation of large Seebeck effect in PtAs$_2$ and PtP$_2$. https://doi.org/10.7566/jpsj.83.023706

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