Effect of localization–delocalization transition on thermoelectric properties of Bi2Te2Se topological insulator

The thermal transport properties of Bi2Te2Se topological insulators show a range of complex features. Large bulk resistivities coexisting with prominent Shubnikov–de Haas quantum oscillations and proximity to metallic states mark this p-band system as an unconventional topological quantum material....

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Veröffentlicht in:APL energy 2024-03, Vol.2 (1), p.016102-016102-6
Hauptverfasser: Craco, L., Leoni, S.
Format: Artikel
Sprache:eng
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Zusammenfassung:The thermal transport properties of Bi2Te2Se topological insulators show a range of complex features. Large bulk resistivities coexisting with prominent Shubnikov–de Haas quantum oscillations and proximity to metallic states mark this p-band system as an unconventional topological quantum material. Here, using the density functional plus dynamical mean-field theory method, we show how localization–delocalization transition underpins the T-dependence of thermoelectric responses from room down to low temperatures. We present the implications of our many-particle analysis to resistivity, Seebeck coefficient, thermal conductivity, and Lorenz number and propose that related broadband systems close to electronic transitions could be of use in thermoelectrics.
ISSN:2770-9000
2770-9000
DOI:10.1063/5.0173308