تقرير
Magnetic and electronic properties at the gamma-Al2O3/SrTiO3 interface
| العنوان: | Magnetic and electronic properties at the gamma-Al2O3/SrTiO3 interface |
|---|---|
| المؤلفون: | Mardegan, J. R. L., Christensen, D. V., Chen, Y. Z., Parchenko, S., Avula, S. R. V., Ortiz-Hernandez, N., Decker, M., Piamonteze, C., Pryds, N., Staub, U. |
| المصدر: | Phys. Rev. B 99, 134423 (2019) |
| سنة النشر: | 2019 |
| المجموعة: | Condensed Matter |
| مصطلحات موضوعية: | Condensed Matter - Strongly Correlated Electrons |
| الوصف: | The magnetic and electronic nature of the gamma-Al2O3/SrTiO3 spinel/perovskite interface is explored by means of x-ray absorption spectroscopy. Polarized x-ray techniques combined with atomic multiplet calculations reveal localized magnetic moments assigned to Ti3+ at the interface with equivalent size for in- and out-of-plane magnetic field directions. Although magnetic fingerprints are revealed, the Ti3+ magnetism can be explained by a paramagnetic response at low temperature under applied magnetic fields. Modeling the x-ray linear dichroism results in a delta0 = 1.9 eV splitting between the t2g and eg states for the Ti4+ 3d0 orbitals. In addition these results indicate that the lowest energy states have the out-of-plane dxz/dyz symmetry. The isotropic magnetic moment behavior and the lowest energy dxz/dyz states are in contrast to the observations for the two-dimensional electron gas at the perovskite/perovskite interface of LaAlO3/SrTiO3, that exhibits an anisotropic magnetic dxy ground state. Comment: 6 pages, 5 figures |
| نوع الوثيقة: | Working Paper |
| DOI: | 10.1103/PhysRevB.99.134423 |
| URL الوصول: | http://arxiv.org/abs/1901.09601 |
| رقم الأكسشن: | edsarx.1901.09601 |
| قاعدة البيانات: | arXiv |
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