%0 Journal Article
%T Orbital selective switching of ferromagnetism in an oxide quasi two-dimensional electron gas
%+ CNR-SPIN and Department of Physics “E. Pancini
%+ University of Naples Federico II = Università degli studi di Napoli Federico II
%+ Universität Duisburg-Essen = University of Duisburg-Essen [Essen]
%+ SwissFEL, Paul Scherrer Institut
%+ Paul Scherrer Institute (PSI)
%+ Institut de Physique et Chimie des Matériaux de Strasbourg (IPCMS)
%+ Laboratoire Charles Coulomb (L2C)
%+ Dipartimento di Fisica [Politecnico Milano] (POLIMI)
%A Di Capua, R.
%A Verma, M.
%A Radovic, M.
%A Strocov, V.
%A Piamonteze, C.
%A Guedes, E.
%A Plumb, N.
%A Chen, Yu
%A D’antuono, M.
%A de Luca, G.
%A Di Gennaro, E.
%A Stornaiuolo, D.
%A Preziosi, D.
%A Jouault, Benoit
%A Miletto Granozio, F.
%A Sambri, A.
%A Pentcheva, R.
%A Ghiringhelli, G.
%A Salluzzo, M.
%< avec comité de lecture
%@ 2397-4648
%J Npj Quantum Materials
%I Nature publishing
%V 7
%N 1
%P 41
%8 2022-12
%D 2022
%Z 2109.06138
%R 10.1038/s41535-022-00448-4
%Z Physics [physics]/Condensed Matter [cond-mat]Journal articles
%X Abstract Multi-orbital physics in quasi-two-dimensional electron gases (q2DEGs) triggers intriguing phenomena not observed in bulk materials, such as unconventional superconductivity and magnetism. Here, we investigate the mechanism of orbital selective switching of the spin-polarization in the oxide q2DEG formed at the (001) interface between the LaAlO 3 , EuTiO 3 and SrTiO 3 band insulators. By using density functional theory calculations, transport, magnetic and x-ray spectroscopy measurements, we find that the filling of titanium-bands with 3d xz /3d yz orbital character in the EuTiO 3 layer and at the interface with SrTiO 3 induces an antiferromagnetic to ferromagnetic switching of the exchange interaction between Eu-4f 7 magnetic moments. The results explain the observation of the carrier density-dependent ferromagnetic correlations and anomalous Hall effect in this q2DEG, and demonstrate how combined theoretical and experimental approaches can lead to a deeper understanding of emerging electronic phases and serve as a guide for the materials design of advanced electronic applications.
%G English
%2 https://cnrs.hal.science/hal-03884373v2/document
%2 https://cnrs.hal.science/hal-03884373v2/file/s41535-022-00448-4.pdf
%L hal-03884373
%U https://cnrs.hal.science/hal-03884373
%~ INSERM
%~ CNRS
%~ UNIV-STRASBG
%~ L2C
%~ INC-CNRS
%~ UNIV-MONTPELLIER
%~ SITE-ALSACE
%~ UM-2015-2021
%~ UM-EPE