Titaniumdxy ferromagnetism at the LaAlO3/SrTiO3 interface
Jun-Sik Lee,Yanwu Xie,Hiroki K. Sato,Christopher Bell,Y. Hikita,Harold Y. Hwang,Harold Y. Hwang,Chi-Chang Kao +7 more
TLDR
Spectroscopic investigations of the magnetism using element-specific techniques, including X-ray magnetic circular dichroism andX-ray absorption spectroscopy, are reported, finding direct evidence for in-plane ferromagnetic order at the interface with Ti(3+) character in the dxy orbital of the anisotropic t2g band.Abstract:
A number of recent transport and magnetization studies have shown signs of ferromagnetism in the LaAlO3/SrTiO3 heterostructure, an unexpected property with no bulk analogue in the constituent materials. However, no experiment thus far has provided direct information on the host of the magnetism. Here we report spectroscopic investigations of the magnetism using element-specific techniques, including X-ray magnetic circular dichroism and X-ray absorption spectroscopy, along with corresponding model calculations. We find direct evidence for in-plane ferromagnetic order at the interface, with Ti(3+) character in the dxy orbital of the anisotropic t2g band. These findings establish a striking example of emergent phenomena at oxide interfaces.read more
Citations
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Interface-induced phenomena in magnetism
Frances Hellman,Axel Hoffmann,Yaroslav Tserkovnyak,Geoffrey S. D. Beach,Eric E. Fullerton,Chris Leighton,Allan H. MacDonald,Daniel C. Ralph,Dario Arena,Hermann A. Dürr,Peter Fischer,Julie Grollier,Joseph P. Heremans,Tomas Jungwirth,Tomas Jungwirth,Alexey Kimel,B Bert Koopmans,Ilya Krivorotov,Steven J. May,Amanda K. Petford-Long,James M. Rondinelli,Nitin Samarth,Ivan K. Schuller,Ivan K. Schuller,Andrei Slavin,Mark D. Stiles,Oleg Tchernyshyov,André Thiaville,Barry L. Zink +28 more
TL;DR: This article reviews static and dynamic interfacial effects in magnetism, focusing on interfacially-driven magnetic effects and phenomena associated with spin-orbit coupling and intrinsic symmetry breaking at interfaces, identifying the most exciting new scientific results and pointing to promising future research directions.
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Recent progress in voltage control of magnetism: Materials, mechanisms, and performance
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Recent progress in voltage control of magnetism: Materials, mechanisms, and performance
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A polarity-induced defect mechanism for conductivity and magnetism at polar–nonpolar oxide interfaces
Liping Yu,Alex Zunger +1 more
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Vacancies in functional materials for clean energy storage and harvesting: the perfect imperfection
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References
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Journal ArticleDOI
A high-mobility electron gas at the LaAlO3/SrTiO3 heterointerface
TL;DR: A model interface is examined between two insulating perovskite oxides—LaAlO3 and SrTiO3—in which the termination layer at the interface is controlled on an atomic scale, presenting a broad opportunity to tailor low-dimensional charge states by atomically engineered oxide heteroepitaxy.
Journal ArticleDOI
Superconducting Interfaces Between Insulating Oxides
Nicolas Reyren,Stefan Thiel,Andrea D. Caviglia,L. Fitting Kourkoutis,German Hammerl,Christoph Richter,Christof W. Schneider,Thilo Kopp,Anna-Sabina Ruetschi,Didier Jaccard,Marc Gabay,David A. Muller,Jean-Marc Triscone,Jochen Mannhart +13 more
TL;DR: This work reports on superconductivity in the electron gas formed at the interface between two insulating dielectric perovskite oxides, LaAlO3 and SrTiO3.
Journal ArticleDOI
Emergent phenomena at oxide interfaces
TL;DR: Recent technical advances in the atomic-scale synthesis of oxide heterostructures have provided a fertile new ground for creating novel states at their interfaces, with characteristic feature is the reconstruction of the charge, spin and orbital states at interfaces on the nanometre scale.
Journal ArticleDOI
Tunable Quasi-Two-Dimensional Electron Gases in Oxide Heterostructures
TL;DR: A large electric-field response of quasi–two-dimensional electron gases generated at interfaces in epitaxial heterostructures grown from insulating oxides is reported, indicating that the conductivity of the electron gases can be modulated through a quantum phase transition from an insulating to a metallic state.
Journal ArticleDOI
Magnetic effects at the interface between non-magnetic oxides
Alexander Brinkman,Mark Huijben,Mark Huijben,M. van Zalk,J. Huijben,Uli Zeitler,Jan C. Maan,W.G. van der Wiel,Guus Rijnders,David H.A. Blank,Hans Hilgenkamp +10 more
TL;DR: In this article, the authors show how magnetism can be induced at the interface between the otherwise non-magnetic insulating perovskites SrTiO3 and LaAlO3.