Orbital selective switching of ferromagnetism in an oxide quasi two-dimensional electron gas - Laboratoire Charles Coulomb (L2C) Accéder directement au contenu
Article Dans Une Revue Npj Quantum Materials Année : 2022

Orbital selective switching of ferromagnetism in an oxide quasi two-dimensional electron gas

M. Radovic
V. Strocov
N. Plumb
Benoit Jouault

Résumé

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.
Fichier principal
Vignette du fichier
s41535-022-00448-4.pdf (4.08 Mo) Télécharger le fichier
Origine : Fichiers éditeurs autorisés sur une archive ouverte

Dates et versions

hal-03884373 , version 1 (23-11-2021)
hal-03884373 , version 2 (07-12-2022)

Licence

Paternité

Identifiants

Citer

R. Di Capua, M. Verma, M. Radovic, V. Strocov, C. Piamonteze, et al.. Orbital selective switching of ferromagnetism in an oxide quasi two-dimensional electron gas. Npj Quantum Materials, 2022, 7 (1), pp.41. ⟨10.1038/s41535-022-00448-4⟩. ⟨hal-03884373v2⟩
199 Consultations
110 Téléchargements

Altmetric

Partager

Gmail Facebook X LinkedIn More