Huge Thermoelectric Power Factor: FeSb2 versus FeAs2 and RuSb2

Abstract

The thermoelectric power factor of the narrow-gap semiconductor FeSb2 is greatly enhanced in comparison to the isostructural homologues FeAs2 and RuSb2. Comparative studies of magnetic and thermodynamic properties provide evidence that the narrow and correlated bands as well as the associated enhanced thermoelectricity are only specific to FeSb2. Our results point to the potential of FeSb2 for practical thermoelectric application at cryogenic temperatures and stimulate the search for new correlated semiconductors along the same lines.

14 pages, 4 figures, published in Applied Physics Express

References in corpus (4)

• Kondo Insulator description of spin state transition in FeSb2
• Optical investigation of the metal-insulator transition in $FeS{b}_2$
• The semiconductor-to-ferromagnetic-metal transition in FeSb2
• Giant Carrier Mobility in Single Crystals of FeSb2

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• Unified picture for the colossal thermopower compound FeSb${}_2$
• Electronic thermoelectric power factor and metal-insulator transition in FeSb2
• Unchanged thermopower enhancement at the semiconductor-metal transition in correlated FeSb${}_{2-x}$Te${}_x$
• Thermoelectric transport in strained Si and Si/Ge heterostructures
• Strong electron correlations in FeSb2: An optical investigation and comparison with RuSb2
• Pudding-mold type band in a potential thermoelectric material CuAlO${}_2$ : comparison with Na${}_x$CoO${}_2$
• Enhancement of the thermoelectric properties in doped FeSb${}_2$ bulk crystals
• Very high thermoelectric power factor in a Fe3O4/SiO2/p-type Si(100)heterostructure
• Metallic surface states in a correlated d-electron topological Kondo insulator candidate FeSb2
• Vacancy defect control of colossal thermopower in FeSb2
• 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
• Enhanced electron correlations in FeSb${}_2$
• Enhanced Thermoelectric Power and Electronic Correlations in RuSe${}_2$
• Current transport and thermoelectric properties of very high power factor Fe3O4 / SiO2 / p-type Si (001) devices
• Dense superconducting phases of copper-bismuth at high pressure
• Thermopower of the Correlated Narrow Gap Semiconductor FeSi and Comparison to RuSi
• LinReTraCe: The Linear Response Transport Centre
• Large thermopower in the antiferromagnetic semiconductor BaMn${}_2$Bi${}_2$
• Optical conductivity and vibrational spectra of the narrow-gap semiconductor FeGa${}_3$
• Origin of anomalous temperature dependence of Nernst effect in narrow-gap semiconductors
• Prototypical many-body signatures in transport properties of semiconductors