by Di Capua, R., Verma, M., Radovic, M., Strocov, V.N., Piamonteze, C., Guedes, E.B., Plumb, N.C., Chen, Yu, D’Antuono, M., De Luca, G.M., Di Gennaro, E., Stornaiuolo, D., Preziosi, D., Jouault, B., Miletto Granozio, F., Sambri, A., Pentcheva, R., Ghiringhelli, G. and Salluzzo, M.
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 LaAlO3, EuTiO3 and SrTiO3 band insulators. By using density functional theory calculations, transport, magnetic and x-ray spectroscopy measurements, we find that the filling of titanium-bands with 3dxz/3dyz orbital character in the EuTiO3 layer and at the interface with SrTiO3 induces an antiferromagnetic to ferromagnetic switching of the exchange interaction between Eu-4f7 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. © 2022, The Author(s).
Reference:
Orbital selective switching of ferromagnetism in an oxide quasi two-dimensional electron gas (Di Capua, R., Verma, M., Radovic, M., Strocov, V.N., Piamonteze, C., Guedes, E.B., Plumb, N.C., Chen, Yu, D’Antuono, M., De Luca, G.M., Di Gennaro, E., Stornaiuolo, D., Preziosi, D., Jouault, B., Miletto Granozio, F., Sambri, A., Pentcheva, R., Ghiringhelli, G. and Salluzzo, M.), In npj Quantum Materials, volume 7, 2022.
Bibtex Entry:
@ARTICLE{Di Capua2022,
author = {Di Capua, R. and Verma, M. and Radovic, M. and Strocov, V.N. and Piamonteze, C. and Guedes, E.B. and Plumb, N.C. and Chen, Yu and D’Antuono, M. and De Luca, G.M. and Di Gennaro, E. and Stornaiuolo, D. and Preziosi, D. and Jouault, B. and Miletto Granozio, F. and Sambri, A. and Pentcheva, R. and Ghiringhelli, G. and Salluzzo, M.},
title = {Orbital selective switching of ferromagnetism in an oxide quasi two-dimensional electron gas},
year = {2022},
journal = {npj Quantum Materials},
volume = {7},
number = {1},
doi = {10.1038/s41535-022-00448-4},
url = {https://www.scopus.com/inward/record.uri?eid=2-s2.0-85128236426&doi=10.1038%2fs41535-022-00448-4&partnerID=40&md5=2cbf5789197d9f83758af3390131f140},
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 LaAlO3, EuTiO3 and SrTiO3 band insulators. By using density functional theory calculations, transport, magnetic and x-ray spectroscopy measurements, we find that the filling of titanium-bands with 3dxz/3dyz orbital character in the EuTiO3 layer and at the interface with SrTiO3 induces an antiferromagnetic to ferromagnetic switching of the exchange interaction between Eu-4f7 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. © 2022, The Author(s).},
correspondence_address = {M. Salluzzo; CNR-SPIN, Complesso Monte Sant’Angelo via Cinthia, Napoli, I-80126, Italy; email: marco.salluzzo@spin.cnr.it},
type = {Article},
publication_stage = {Final},
source = {Scopus},
note = {All Open Access, Gold Open Access, Green Open Access}
}
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