title: Unified Picture for the Colossal Thermopower Compound FeSb2.
abstract: We identify the driving mechanism of the gigantic Seebeck coefficient in FeSb2 as the phonon-drag effect associated with an in-gap density of states that we demonstrate to derive from excess iron. We accurately model electronic and thermoelectric transport coefficients and explain the so far ill-understood correlation of maxima and inflection points in different response functions. Our scenario has far-reaching consequences for attempts to harvest the spectacular power factor of FeSb2.
authors.affiliation: Institute for Solid State Physics, Vienna University of Technology, Vienna A-1040, Austria.
authors.forename: M
authors.initials: M
authors.lastname: Battiato
authors.affiliation: Institute for Solid State Physics, Vienna University of Technology, Vienna A-1040, Austria.
authors.forename: J M
authors.initials: JM
authors.lastname: Tomczak
authors.affiliation: Institute for Solid State Physics, Vienna University of Technology, Vienna A-1040, Austria.
authors.forename: Z
authors.initials: Z
authors.lastname: Zhong
authors.affiliation: Institute for Solid State Physics, Vienna University of Technology, Vienna A-1040, Austria.
authors.forename: K
authors.initials: K
authors.lastname: Held