تقرير
Visualising emergent phenomena at oxide interfaces
| العنوان: | Visualising emergent phenomena at oxide interfaces |
|---|---|
| المؤلفون: | Oberaigner, Michael, Ederer, Manuel, Chaluvadi, Sandeep Kumar, Orgiani, Pasquale, Ciancio, Regina, Löffler, Stefan, Kothleitner, Gerald, Knez, Daniel |
| سنة النشر: | 2023 |
| المجموعة: | Condensed Matter |
| مصطلحات موضوعية: | Condensed Matter - Materials Science |
| الوصف: | Knowledge of atomic-level details of structure, chemistry, and electronic states is paramount for a comprehensive understanding of emergent properties at oxide interfaces. We utilise a novel methodology based on atomic-scale electron energy loss spectroscopy (EELS) to spatially map the electronic states tied to the formation of a two-dimensional electron gas (2DEG) at the prototypical non-polar/polar $TiO_2$/$LaAlO_3$ interface. Combined with differential phase contrast analysis we directly visualise the microscopic locations of ions and charge and find that 2DEG states and $Ti^{3+}$ defect states exhibit different spatial distributions. Supported by density functional theory (DFT) and inelastic scattering simulations we examine the role of oxygen vacancies in 2DEG formation. Our work presents a general pathway to directly image emergent phenomena at interfaces using this unique combination of arising microscopy techniques with machine learning assisted data analysis procedures. Comment: 17 pages, 10 figures |
| نوع الوثيقة: | Working Paper |
| URL الوصول: | http://arxiv.org/abs/2310.03863 |
| رقم الأكسشن: | edsarx.2310.03863 |
| قاعدة البيانات: | arXiv |
| الوصف غير متاح. |