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 (23)

• First principles approach to the electronic structure of strongly correlated systems: combining GW and DMFT
• The onset of the vortex-like Nernst signal above Tc in La_{2-x}Sr_xCuO_4 and Bi_2Sr_{2-y}La_yCuO_6
• The Nernst effect and the boundaries of the Fermi liquid picture
• Anisotropy and large magnetoresistance in narrow gap semiconductor FeSb2
• Kondo Insulator description of spin state transition in FeSb2
• Signatures of electronic correlations in iron silicide
• Thermopower of correlated semiconductors : application to FeAs2 and FeSb2
• Huge Thermoelectric Power Factor: FeSb2 versus FeAs2 and RuSb2
• Optical investigation of the metal-insulator transition in $FeS{b}_2$
• Dynamical correlations and screened exchange on the experimental bench: spectral properties of the cobalt pnictide BaCo2As2
• Thermoelectric imaging of structural disorder in epitaxial graphene
• Phonon-drag effect in FeGa3
• Double quantum dot as a minimal thermoelectric generator
• 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
• Ab initio calculations with the dynamical vertex approximation
• Highly Dispersive Electron Relaxation and Colossal Thermoelectricity in the Correlated Semiconductor FeSb${}_2$
• QSGW+DMFT: an electronic structure scheme for the iron pnictides and beyond
• Origin of the energy gap in the narrow-gap semiconductor FeSb2 revealed by high-pressure magnetotransport measurements
• Absence of localized-spin magnetism in the narrow-gap semiconductor FeSb2

Cited by in corpus (17)

• Nernst effect in metals and superconductors: a review of concepts and experiments
• Ab initio optimization of phonon drag effect for lower-temperature thermoelectric energy conversion
• Thermoelectricity in correlated narrow-gap semiconductors
• Chirality-Induced Selectivity of Phonon Angular Momenta in Chiral Quartz Crystals
• Significant Phonon Drag Effect in Wide Bandgap GaN and AlN
• Vacancy defect control of colossal thermopower in FeSb2
• Unusual electronic and vibrational properties in the colossal thermopower material FeSb${}_2$
• Anisotropic Correlated Electronic Structure of Colossal Thermopower Marcasite FeSb${}_2$
• Study for material analogs of FeSb${}_2$: material design for thermoelectric materials
• Boltzmann approach to high-order transport: the non-linear and non-local responses
• LinReTraCe: The Linear Response Transport Centre
• Optical conductivity and vibrational spectra of the narrow-gap semiconductor FeGa${}_3$
• Importance of Schottky barriers for wide-bandgap thermoelectric devices
• Origin of anomalous temperature dependence of Nernst effect in narrow-gap semiconductors
• Anisotropic Surface State Band Splitting and Low Energy Flat Bands in 3d Correlated Topological Kondo Insulator Candidate FeSb${}_2$
• 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