Electronic properties of nickelate-based heterostructures
Invited
Abstract
Epitaxial heterostructures offer multiple strategies to manipulate the interplay between the different degrees of freedom in transition metal oxides. Interfacial structural and electronic couplings are key to tune the functionalities of these materials and even allow access to novel electronic phases.
Perovskite nickelates are interesting materials displaying a metal to insulator transition, with the insulating state characterized by two inequivalent Ni sites. A particular antiferromagnetic order is also stabilized in this low-temperature bond disproportionated state. Through the growth of NdNiO3/SmNiO3 superlattices, it will be shown that the existence of a single or double metal-insulator transition temperature can be controlled as function of the layer periodicity. The structural and electronic mechanisms driving this behaviour will be discussed.
Heterostructures also offer large versatility from a synthesis point of view. For example, a double-perovskite heterostructure such as La2NiMnO6 can be reproduced as a (111)pc-oriented LaNiO3/LaMnO3 superlattices when 1 monolayer-thick layers are considered. The magnetic properties of the high Curie-temperature ferromagnetic La2NiMnO6 heterostructure, synthesized both through a thin film and a superlattice approach, will also be presented.
Perovskite nickelates are interesting materials displaying a metal to insulator transition, with the insulating state characterized by two inequivalent Ni sites. A particular antiferromagnetic order is also stabilized in this low-temperature bond disproportionated state. Through the growth of NdNiO3/SmNiO3 superlattices, it will be shown that the existence of a single or double metal-insulator transition temperature can be controlled as function of the layer periodicity. The structural and electronic mechanisms driving this behaviour will be discussed.
Heterostructures also offer large versatility from a synthesis point of view. For example, a double-perovskite heterostructure such as La2NiMnO6 can be reproduced as a (111)pc-oriented LaNiO3/LaMnO3 superlattices when 1 monolayer-thick layers are considered. The magnetic properties of the high Curie-temperature ferromagnetic La2NiMnO6 heterostructure, synthesized both through a thin film and a superlattice approach, will also be presented.
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Presenters
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Marta Gibert
Physik-Institut, University of Zurich, Physik Institut, University of Zurich, University of Geneva, Department of Quantum Matter Physics, University of Geneva, University of Zurich
Authors
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Marta Gibert
Physik-Institut, University of Zurich, Physik Institut, University of Zurich, University of Geneva, Department of Quantum Matter Physics, University of Geneva, University of Zurich