| Autor: |
Muff, Stefan, Pilet, Nicolas, Fanciulli, Mauro, Weber, Andrew P., Wessler, Christian, Ristic, Zoran, Wang, Zhiming, Plumb, Nicholas C., Radovic, Milan, Dil, J. Hugo |
| Rok vydání: |
2017 |
| Předmět: |
|
| Zdroj: |
Phys. Rev. B 98, 045132 (2018) |
| Druh dokumentu: |
Working Paper |
| DOI: |
10.1103/PhysRevB.98.045132 |
| Popis: |
Observation of Bloch oscillations and Wannier-Stark localization of charge carriers is typically impossible in single-crystals, because an electric field higher than the breakdown voltage is required. In BaTiO$_3$ however, high intrinsic electric fields are present due to its ferroelectric properties. With angle-resolved photoemission we directly probe the Wannier-Stark localized surface states of the BaTiO$_3$ film-vacuum interface and show that this effect extends to thin SrTiO$_3$ overlayers. The electrons are found to be localized along the in-plane polarization direction of the BaTiO$_3$ film. |
| Databáze: |
arXiv |
| Externí odkaz: |
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