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March 5, 2026Journal of Applied Physics

Thermoelectric properties of two-dimensional topological insulators TlBi and TlSb

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Authors

LGL. J. GongRCR. S. ChengQHQ. Z. Han

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Overview

Investigation finds unique thermoelectric behaviors in two-dimensional topological insulators, indicating potential applications.

Key Points

  • The aim is to investigate the thermoelectric properties of TlBi and TlSb topological insulators using advanced computational methods.
  • Conducted first-principles calculations to determine band structure and thermoelectric performance.
  • Employed nonequilibrium Green’s function methods to analyze edge and bulk state influences.
  • Examined monolayer and nanoribbon forms of TlBi and TlSb to compare their thermoelectric figures of merit.
  • TlBi exhibits a high thermoelectric figure of merit ZT≈2.6, while TlSb shows moderate ZT≈0.6.
  • ZT peaks along the armchair and zigzag directions for TlSb are nearly identical, differing from TlBi.
  • Edge states in nanoribbons significantly suppress Seebeck coefficients and overall ZT compared to monolayers.

Cite This Study

Gong et al. (2026) studied this question.

synapsesocial.com/papers/69a91db5d6127c7a504c0d1chttps://doi.org/10.1063/5.0312255
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