An Off-Axis Electron Holography Study of the Built-In Electric Field in LaAlO3/SrTiO3 Heterointerface
Authors
Lin Xie
Corresponding Author
Lin Xie
Available Online December 2016.
- DOI
- 10.2991/icmse-16.2016.79How to use a DOI?
- Keywords
- Electron holography, LaAlO3/SrTiO3 heterojunction, Two-dimensional electron gas, Built-in electric field.
- Abstract
The built-in electric field across LaAlO3/SrTiO3 heterointerface, which hosts two-dimensional electron gas (2DEG), is studied by off-axis electron holography in transmission electron microscopy (TEM). On the contrary to the well-accepted polar catastrophe model, which indicates a Zener breakdown due to the strong built-in electric field in LaAlO3 (~0.24 V/), we find that such an internal electric field in LaAlO3 is almost negligible (<0.1 V/) when compared to the band bending of SrTiO3. Our results suggest that the emergence of 2DEG should have other explanations beyond the polar catastrophe model.
- Copyright
- © 2016, the Authors. Published by Atlantis Press.
- Open Access
- This is an open access article distributed under the CC BY-NC license (http://creativecommons.org/licenses/by-nc/4.0/).
Cite this article
TY - CONF AU - Lin Xie PY - 2016/12 DA - 2016/12 TI - An Off-Axis Electron Holography Study of the Built-In Electric Field in LaAlO3/SrTiO3 Heterointerface BT - Proceedings of the 4th 2016 International Conference on Material Science and Engineering (ICMSE 2016) PB - Atlantis Press SP - 475 EP - 479 SN - 2352-5401 UR - https://doi.org/10.2991/icmse-16.2016.79 DO - 10.2991/icmse-16.2016.79 ID - Xie2016/12 ER -