Enhanced thermoelectric properties by Ir doping of PtSb2 with pyrite structure

Y. Nishikubo; S. Nakano; K. Kudo; M. Nohara

doi:10.1063/1.4729789

Enhanced thermoelectric properties by Ir doping of PtSb2 with pyrite structure

Strongly Correlated Electrons 2012-06-21 v1 Materials Science

Authors: Y. Nishikubo , S. Nakano , K. Kudo , M. Nohara

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Abstract

The effects of Ir doping on the thermoelectric properties of Pt1-xIrxSb2 (x = 0, 0.01, 0.03, and 0.1) with pyrite structure were studied. Measurements of electrical resistivity rho, Seebeck coefficient S, and thermal conductivity kappa were conducted. The results showed an abrupt change from semiconducting behavior without Ir (x = 0) to metallic behavior at x = 0.01. The sample with x = 0.01 exhibited large S and low rho, resulting in a maximum power factor (S^2/rho) of 43 muW/cmK^2 at 400 K. The peculiar "pudding mold"-type electronic band dispersion could explain the enhanced thermoelectric properties in the metallic state.

Keywords

thermoelectric properties Ir doping PtSb2 pyrite structure power factor electronic band dispersion

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@article{arxiv.1206.4482,
  title  = {Enhanced thermoelectric properties by Ir doping of PtSb2 with pyrite structure},
  author = {Y. Nishikubo and S. Nakano and K. Kudo and M. Nohara},
  journal= {arXiv preprint arXiv:1206.4482},
  year   = {2012}
}

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3 pages, 2 figures

Enhanced thermoelectric properties by Ir doping of PtSb2 with pyrite structure

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