ApplPhysLett_100_252104.pdf 356 KB
Nishikubo, Yoshihiro Department of Physics, Okayama University
Nakano, Seiya Department of Physics, Okayama University
Kudo, Kazutaka Department of Physics, Okayama University
Nohara, Minoru Department of Physics, Okayama University
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 mu W/cmK(2) at 400 K. The peculiar "pudding mold"-type electronic band dispersion could explain the enhanced thermoelectric properties in the metallic state.
Applied Physics Letters
American Institute of Physics.
© 2012 American Institute of Physics.
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