The surface-to-volume ratio: A key parameter in the thermoelectric transport of topological insulator Bi2Se3 nanowires

Shin HS, Hamdou B, Reith H, Osterhage H, Gooth J, Damm C, Rellinghaus B, Pippel E, Nielsch K (2016)

Publication Type: Journal article

Publication year: 2016

Journal

Nanoscale Royal Society of Chemistry

Book Volume: 8

Pages Range: 13552-13557

Journal Issue: 28

DOI: 10.1039/c6nr01716a

Abstract

We systematically investigated the role of topological surface states on thermoelectric transport by varying the surface-to-volume ratio (s/v) of Bi2Se3 nanowires. The thermoelectric coefficients of Bi2Se3 nanowires were significantly influenced by the topological surface states with increasing the s/v. The Seebeck coefficient of Bi2Se3 nanowires decreased with increasing the s/v, while the electrical conductivity increased with increasing the s/v. This implies that the influence of metallic surface states become dominant in thermoelectric transport in thin nanowires, and the s/v is a key parameter which determines the total thermoelectric properties. Our measurements were corroborated by using a two-channel Boltzmann transport model.

Involved external institutions

Universität Hamburg (UHH) DE Germany (DE) Leibniz-Institut für Festkörper- und Werkstoffforschung Dresden e.V. (IFW) / Leibniz Institute for Solid State and Materials Research Dresden DE Germany (DE) Max-Planck-Institut für Mikrostrukturphysik (MSP) / Max Planck Institute for Microstructure Physics DE Germany (DE)

How to cite

APA:

Shin, H.S., Hamdou, B., Reith, H., Osterhage, H., Gooth, J., Damm, C.,... Nielsch, K. (2016). The surface-to-volume ratio: A key parameter in the thermoelectric transport of topological insulator Bi2Se3 nanowires. Nanoscale, 8(28), 13552-13557. https://doi.org/10.1039/c6nr01716a

MLA:

Shin, Ho Sun, et al. "The surface-to-volume ratio: A key parameter in the thermoelectric transport of topological insulator Bi2Se3 nanowires." Nanoscale 8.28 (2016): 13552-13557.

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