| Autor: |
Tkáč, V., Výborný, K., Komanický, V., Warmuth, J., Michiardi, M., Ngankeu, A. S., Vališka, R. Tarasenko M., Stetsovych, V., Carva, K., Garate, I., Bianchi, M., Wiebe, J., Holý, V., Hofmann, Ph., Springholz, G., Sechovský, V., Honolka, J. |
| Rok vydání: |
2018 |
| Předmět: |
|
| Zdroj: |
Phys. Rev. Lett. 123, 036406 (2019) |
| Druh dokumentu: |
Working Paper |
| DOI: |
10.1103/PhysRevLett.123.036406 |
| Popis: |
Magnetotransport constitutes a useful probe to understand the interplay between electronic band topology and magnetism in spintronics devices based on topological materials. A recent theory of Lu and Shen [Phys. Rev. Lett. 112, 146601 (2014)] on magnetically doped topological insulators predicts that quantum corrections $\Delta\kappa$ to the temperature-dependence of the conductivity can change sign during the Curie transition. This phenomenon has been attributed to a suppression of the Berry phase of the topological surface states at the Fermi level, caused by a magnetic energy gap. Here, we demonstrate experimentally that $\Delta\kappa$ can reverse its sign even when the Berry phase at the Fermi level remains unchanged, provided that the inelastic scattering length decreases with temperature below the Curie transition. |
| Databáze: |
arXiv |
| Externí odkaz: |
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