On the Power Factor of Bismuth-Telluride-Based Alloys near Topological Phase Transitions at High Pressures
- Authors: Korobeinikov I.V.1, Morozova N.V.1, Lukyanova L.N.2, Usov O.A.2, Ovsyannikov S.V.3,4
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Affiliations:
- Mikheev Institute of Metal Physics, Ural Branch, Russian Academy of Sciences
- Ioffe Institute
- Bayerisches Geoinstitut, Universitat Bayreuth
- Institute for Solid State Chemistry, Ural Branch, Russian Academy of Sciences
- Issue: Vol 53, No 6 (2019)
- Pages: 732-736
- Section: XVI International Conference “thermoelectrics and Their Applications–2018” (Iscta 2018,) St. Petersburg, October 8–12, 2018
- URL: https://journals.rcsi.science/1063-7826/article/view/206235
- DOI: https://doi.org/10.1134/S1063782619060083
- ID: 206235
Cite item
Abstract
The Seebeck coefficient S and electrical conductivity σ of bismuth-telluride-based alloys with substituents in the Bi and Te sublattices are studied at pressures up to 12 GPa at room temperature. It is shown that the electrical conductivity increases with pressure and, despite a decrease in the Seebeck coefficient, the power factor S2σ increases in p-Bi0.5Sb1.5Te3 and n-Bi2Te1.65Se0.65S0.7 alloys. A maximum increase in the power factor is observed for n-Bi2Te1.65Se0.65S0.7 in the pressure range of 3–4 GPa corresponding to the electronic topological phase transition. The studied alloys are used in modeling the thermoelectric module with adjustable mechanical stress applied to thermoelements.
About the authors
I. V. Korobeinikov
Mikheev Institute of Metal Physics, Ural Branch, Russian Academy of Sciences
Author for correspondence.
Email: i_korobeynikov@mail.ru
Russian Federation, Yekaterinburg, 620108
N. V. Morozova
Mikheev Institute of Metal Physics, Ural Branch, Russian Academy of Sciences
Email: lidia.lukyanova@mail.ioffe.ru
Russian Federation, Yekaterinburg, 620108
L. N. Lukyanova
Ioffe Institute
Author for correspondence.
Email: lidia.lukyanova@mail.ioffe.ru
Russian Federation, St. Petersburg, 194021
O. A. Usov
Ioffe Institute
Email: lidia.lukyanova@mail.ioffe.ru
Russian Federation, St. Petersburg, 194021
S. V. Ovsyannikov
Bayerisches Geoinstitut, Universitat Bayreuth; Institute for Solid State Chemistry, Ural Branch, Russian Academy of Sciences
Email: lidia.lukyanova@mail.ioffe.ru
Germany, Bayreuth, D-95447; Yekaterinburg, 620219