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Large Seebeck effect in electron-doped FeAs<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:msub><mml:mrow /><mml:mn>2</mml:mn></mml:msub></mml:math>driven by a quasi-one-dimensional pudding-mold-type band
We investigate the thermoelectric propeties of the electron-doped FeAs$_2$ both experimentally and theoretically. Electrons are doped by partially substituting Se for As, which leads to a metallic behavior in the resistivity. A Seebeck coefficient of about $-$200 $\mu$V/K is reached at 300 K for 1% doping, and about $-$120 $\mu$V/K …