Discovery of colossal Seebeck effect in metallic Cu2Se

Dogyun Byeon, Robert Sobota, Kévin Delime-Codrin, Seongho Choi, Keisuke Hirata, Masahiro Adachi, Makoto Kiyama, Takashi Matsuura, Yoshiyuki Yamamoto, Masaharu Matsunami and Tsunehiro Takeuchi ()
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Dogyun Byeon: Toyota Technological Institute
Robert Sobota: Toyota Technological Institute
Kévin Delime-Codrin: Toyota Technological Institute
Seongho Choi: Toyota Technological Institute
Keisuke Hirata: Toyota Technological Institute
Masahiro Adachi: Sumitomo Electric Industries, Ltd.
Makoto Kiyama: Sumitomo Electric Industries, Ltd.
Takashi Matsuura: Sumitomo Electric Industries, Ltd.
Yoshiyuki Yamamoto: Sumitomo Electric Industries, Ltd.
Masaharu Matsunami: Toyota Technological Institute
Tsunehiro Takeuchi: Toyota Technological Institute

Nature Communications, 2019, vol. 10, issue 1, 1-7

Abstract: Abstract Both electrical conductivity σ and Seebeck coefficient S are functions of carrier concentration being correlated with each other, and the value of power factor S2σ is generally limited to less than 0.01 W m−1 K−2. Here we report that, under the temperature gradient applied simultaneously to both parallel and perpendicular directions of measurement, a metallic copper selenide, Cu2Se, shows two sign reversals and colossal values of S exceeding ±2 mV K−1 in a narrow temperature range, 340 K

Date: 2019
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DOI: 10.1038/s41467-018-07877-5

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