Unified picture for the colossal thermopower compound FeSb${}_2$

Abstract

We identify the driving mechanism of the gigantic Seebeck coefficient in FeSb${}_2$ 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 powerfactor of FeSb${}_2$.

References in corpus (11)

• The Nernst effect and the boundaries of the Fermi liquid picture
• Thermopower of correlated semiconductors : application to FeAs2 and FeSb2
• Huge Thermoelectric Power Factor: FeSb2 versus FeAs2 and RuSb2
• Dynamical correlations and screened exchange on the experimental bench: spectral properties of the cobalt pnictide BaCo2As2
• Phonon-drag effect in FeGa3
• Transport, Thermal, and Magnetic Properties of the Narrow-Gap Semiconductor CrSb2
• The semiconductor-to-ferromagnetic-metal transition in FeSb2
• Anisotropy in magnetic and transport properties of Fe1-xCoxSb2
• Electronic thermoelectric power factor and metal-insulator transition in FeSb2
• Electronic correlations in FeGa${}_3$ and the effect of hole doping on its magnetic properties
• QSGW+DMFT: an electronic structure scheme for the iron pnictides and beyond

Cited by in corpus (8)

• Chirality-Induced Selectivity of Phonon Angular Momenta in Chiral Quartz Crystals
• Significant Phonon Drag Effect in Wide Bandgap GaN and AlN
• LinReTraCe: The Linear Response Transport Centre
• Optical conductivity and vibrational spectra of the narrow-gap semiconductor FeGa${}_3$
• Theory of Huge Thermoelectric Effect Based on Magnon Drag Mechanism: Application to Thin-Film Heusler Alloy
• Prototypical many-body signatures in transport properties of semiconductors
• Anisotropic Surface State Band Splitting and Low Energy Flat Bands in 3d Correlated Topological Kondo Insulator Candidate FeSb${}_2$
• Origin of anomalous temperature dependence of Nernst effect in narrow-gap semiconductors