Transport properties of a quasi-two-dimensional electron system formed in LaAlO3/EuTiO3/SrTiO3 heterostructures
De Luca, G. M.; Di Capua, R.; Di Gennaro, E.; Granozio, F. Miletto; Stornaiuolo, D.; Salluzzo, M.; Gadaleta, A.; Pallecchi, I.; Marre, D.; Piamonteze, C.; Radovic, M.; Ristic, Z.; Rusponi, S.
2014

Abstract

We study the structural, magnetic, and transport properties of LaAlO3/EuTiO3/SrTiO3 heterostructures grown by pulsed laser deposition. The samples are characterized in situ by electron diffraction and scanning probe microscopy and ex situ by transport measurements and x-ray absorption spectroscopy. LaAlO3/EuTiO3/SrTiO3 films show a ferromagnetic transition at T <= 7.5 K, related to the ordering of Eu2+ spins, even in samples characterized by just two EuTiO3 unit cells. A finite metallic conductivity is observed only in the case of samples composed by one or two EuTiO3 unit cells and, simultaneously, by a LaAlO3 thickness greater than or equal to four unit cells. The effect of ferromagnetic EuTiO3 on the transport properties of delta-doped LaAlO3/EuTiO3/SrTiO3 is critically discussed.

Details

Title Transport properties of a quasi-two-dimensional electron system formed in LaAlO3/EuTiO3/SrTiO3 heterostructures
Author(s) De Luca, G. M. ; Di Capua, R. ; Di Gennaro, E. ; Granozio, F. Miletto ; Stornaiuolo, D. ; Salluzzo, M. ; Gadaleta, A. ; Pallecchi, I. ; Marre, D. ; Piamonteze, C. ; Radovic, M. ; Ristic, Z. ; Rusponi, S.
Published in Physical Review B
Pagination 6
Volume 89
Issue 22
Pages 224413
Date 2014
Publisher College Pk, Amer Physical Soc
ISSN 1098-0121
DOI https://doi.org/10.1103/PhysRevB.89.224413
Other identifier(s) View record in Web of Science
Laboratories LSNS
Record Appears in Scientific production and competences > SB - School of Basic Sciences > SB Archives > LSNS - Laboratory for synchrotron and neutron spectroscopy
Peer-reviewed publications
Work produced at EPFL
Journal Articles
Published
Record creation date 2014-08-29