Thermoelectric properties of iron-based superconductors and parent compounds

Abstract

Herewith, we review the available experimental data of thermoelectric transport properties of iron-based superconductors and parent compounds. We discuss possible physical mechanisms into play in determining the Seebeck effect, from whence one can extract information about Fermi surface reconstruction and Lifshitz transitions, multiband character, coupling of charge carriers with spin excitations and its relevance in the unconventional superconducting pairing mechanism, nematicity, quantum critical fluctuations close to the optimal doping for superconductivity, correlation. Additional information is obtained from the analysis of the Nernst effect, whose enhancement in parent compounds must be related partially to multiband transport and low Fermi level, but mainly to the presence of Dirac cone bands at the Fermi level. In the superconducting compounds, large Nernst effect in the normal state is explained in terms of fluctuating precursors of the spin density wave state, while in the superconducting state it mirrors the usual vortex liquid dissipative regime. A comparison between the phenomenology of thermoelectric behavior of different families of iron-based superconductors and parent compounds allows to evidence the key differences and analogies, thus providing clues on the rich and complex physics of these fascinating unconventional superconductors.

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Cited by in corpus (12)

• Generic Seebeck Effect From Spin Entropy
• BCS-like critical fluctuations with limited overlap of Cooper pairs in FeSe
• Using electron irradiation to probe iron - based superconductors
• Strain-derivative of thermoelectric properties: a sensitive probe for nematicity
• Accurate modeling of FeSe with screened Fock exchange and Hund's metal correlations
• Thermoelectric signatures of order-parameter symmetries in iron-based superconducting tunnel junctions
• Thermoelectricity and electronic correlations enhancement in FeS by slight Se substitution
• Anisotropic Upper Critical Field, Seebeck and Nernst Coefficient in Nb0.20Bi2Se3 Topological Superconductor
• Magnetic disorder and gap symmetry in optimally electron doped Sr(Fe, Co)${}_2$As${}_2$ superconductor
• Enhancement of the critical current by surface irregularities in Fe-based superconductors
• Non-Fermi liquid transport and strong mass enhancement near the nematic quantum critical point in FeSe${}_x$Te${}_{1-x}$ thin films
• The thermoelectric conversion efficiency problem: Insights from the electron gas thermodynamics close to a phase transition