2026-05-03T01:52:46Z https://archive.materialscloud.org/oai2d

oai:materialscloud.org:1001 2021-09-13T09:37:42Z openaire_data community-mcarchive

Mardegan, Jose Christensen, Dennis Staub, Urs Mardegan, Jose Christensen, Dennis Chen, Yunzhong Parchenko, Sergii Avula, Sridhar Ortiz-Hernandez, Nazaret Decker, Martin Piamonteze, Cinthia Pryds, Nini Staub, Urs 2021-09-13 The magnetic and electronic nature of the γ-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. text/plain application/zip text/markdown https://doi.org/10.24435/materialscloud:xx-et oai:materialscloud.org:1001 mcid:2021.147 eng Materials Cloud https://doi.org/10.1103/PhysRevB.99.134423 https://archive.materialscloud.org/communities/mcarchive https://doi.org/10.24435/materialscloud:vd-yv info:eu-repo/semantics/openAccess Creative Commons Attribution 4.0 International https://creativecommons.org/licenses/by/4.0/legalcode two-dimensional electron gas magnetism x-ray absorption spectroscopy Experimental Magnetic and electronic properties at the γ-Al2O3/SrTiO3 interface info:eu-repo/semantics/other