Mobility-enhanced thermoelectric performance in textured nanograin Bi2Se3, effect on scattering and surface-like transport

Bayesteh S, Sailler S, Schloerb H, He R, Schierning G, Nielsch K, Perez N (2022)
Materials Today Physics 24: 100669.

Zeitschriftenaufsatz | Veröffentlicht | Englisch
 
Download
Es wurden keine Dateien hochgeladen. Nur Publikationsnachweis!
Autor*in
Bayesteh, Samaneh; Sailler, Sebastian; Schloerb, Heike; He, Ran; Schierning, GabiUniBi; Nielsch, Kornelius; Perez, Nicolas
Abstract / Bemerkung
We report on the effect of artificially generated textures of Bi2Se3 in thermoelectric performance and low-temperature magnetoresistance. A set of texturized nanograined Bi(2)Se(3 & nbsp;)samples was investigated, ranging from predominantly c-axis texture to random texture. c-axis oriented layered domains rendered the samples highly conducting due to drastically enhanced mobility, up to 1600 cm(2)V-(1)s(-1) at low temperature, and enhanced both carrier concentration and electrical conductivity. The largest power factor of 800 mWm(-1)K(-2) and highest zT z 0.14 both at 300K were observed in a sample with a pre-dominantly layered and c-axis oriented texture. The random texture reduced the thermal conductivity, while the Seebeck coefficient showed no particular correlation with the texture. We have shown that the milling procedure generated a higher degree of disorder by increasing the milling frequency. As a result, the carrier scattering mechanism in the samples changed from mostly electron-phonon interaction at 5Hz to disorder-related scattering at 10Hz and 20Hz milling frequency. The weak antilocalization effect was observed in the magnetoresistance of pressed samples with different textures, pointing towards surface-like transport channels. The Hikami-Larkin-Nagaoka (HLN) model was used to evaluate the phase coherence length, resulting in a high value of roughly 600 nm regardless of the texture. However, a larger number of surface-like transport channels was obtained for the samples with random texture. (C)& nbsp;2022 Published by Elsevier Ltd.
Stichworte
Bi2Se3; Thermoelectricity; Topological insulators; Scattering; Ball; milling
Erscheinungsjahr
2022
Zeitschriftentitel
Materials Today Physics
Band
24
Art.-Nr.
100669
eISSN
2542-5293
Page URI
https://pub.uni-bielefeld.de/record/2963470

Zitieren

Bayesteh S, Sailler S, Schloerb H, et al. Mobility-enhanced thermoelectric performance in textured nanograin Bi2Se3, effect on scattering and surface-like transport. Materials Today Physics . 2022;24: 100669.
Bayesteh, S., Sailler, S., Schloerb, H., He, R., Schierning, G., Nielsch, K., & Perez, N. (2022). Mobility-enhanced thermoelectric performance in textured nanograin Bi2Se3, effect on scattering and surface-like transport. Materials Today Physics , 24, 100669. https://doi.org/10.1016/j.mtphys.2022.100669
Bayesteh, S., Sailler, S., Schloerb, H., He, R., Schierning, G., Nielsch, K., and Perez, N. (2022). Mobility-enhanced thermoelectric performance in textured nanograin Bi2Se3, effect on scattering and surface-like transport. Materials Today Physics 24:100669.
Bayesteh, S., et al., 2022. Mobility-enhanced thermoelectric performance in textured nanograin Bi2Se3, effect on scattering and surface-like transport. Materials Today Physics , 24: 100669.
S. Bayesteh, et al., “Mobility-enhanced thermoelectric performance in textured nanograin Bi2Se3, effect on scattering and surface-like transport”, Materials Today Physics , vol. 24, 2022, : 100669.
Bayesteh, S., Sailler, S., Schloerb, H., He, R., Schierning, G., Nielsch, K., Perez, N.: Mobility-enhanced thermoelectric performance in textured nanograin Bi2Se3, effect on scattering and surface-like transport. Materials Today Physics . 24, : 100669 (2022).
Bayesteh, Samaneh, Sailler, Sebastian, Schloerb, Heike, He, Ran, Schierning, Gabi, Nielsch, Kornelius, and Perez, Nicolas. “Mobility-enhanced thermoelectric performance in textured nanograin Bi2Se3, effect on scattering and surface-like transport”. Materials Today Physics 24 (2022): 100669.

Export

Markieren/ Markierung löschen
Markierte Publikationen

Open Data PUB

Web of Science

Dieser Datensatz im Web of Science®

Suchen in

Google Scholar