Multiferroicity in plastically deformed SrTiO 3 .

Autor: Wang X; Department of Physics, Bar-Ilan University, Ramat Gan, Israel.; Institute of Nanotechnology & Advanced Materials, Bar-Ilan University, Ramat Gan, Israel., Kundu A; Department of Physics, Ariel University, Ariel, Israel., Xu B; Department of Physics, University of Connecticut, Storrs, CT, USA., Hameed S; School of Physics and Astronomy, University of Minnesota, Minneapolis, MN, USA.; Max Planck Institute for Solid State Research, Stuttgart, Germany., Rothem N; Department of Physics, Bar-Ilan University, Ramat Gan, Israel.; Institute of Nanotechnology & Advanced Materials, Bar-Ilan University, Ramat Gan, Israel., Rabkin S; Department of Physics, Bar-Ilan University, Ramat Gan, Israel.; Institute of Nanotechnology & Advanced Materials, Bar-Ilan University, Ramat Gan, Israel., Rogić L; Department of Physics, Faculty of Science, University of Zagreb, Zagreb, Croatia., Thompson L; School of Physics and Astronomy, University of Minnesota, Minneapolis, MN, USA., McLeod A; School of Physics and Astronomy, University of Minnesota, Minneapolis, MN, USA., Greven M; School of Physics and Astronomy, University of Minnesota, Minneapolis, MN, USA., Pelc D; Department of Physics, Faculty of Science, University of Zagreb, Zagreb, Croatia., Sochnikov I; Department of Physics, University of Connecticut, Storrs, CT, USA.; Institute of Materials Science, University of Connecticut, Storrs, CT, USA.; Materials Science and Engineering Department, University of Connecticut, Storrs, CT, USA., Kalisky B; Department of Physics, Bar-Ilan University, Ramat Gan, Israel. beena@biu.ac.il.; Institute of Nanotechnology & Advanced Materials, Bar-Ilan University, Ramat Gan, Israel. beena@biu.ac.il., Klein A; Department of Physics, Ariel University, Ariel, Israel. avrahamk@ariel.ac.il.
Jazyk: angličtina
Zdroj: Nature communications [Nat Commun] 2024 Aug 28; Vol. 15 (1), pp. 7442. Date of Electronic Publication: 2024 Aug 28.
DOI: 10.1038/s41467-024-51615-z
Abstrakt: Quantum materials have a fascinating tendency to manifest novel and unexpected electronic states upon proper manipulation. Ideally, such manipulation should induce strong and irreversible changes and lead to new relevant length scales. Plastic deformation introduces large numbers of dislocations into a material, which can organize into extended structures and give rise to qualitatively new physics as a result of the huge localized strains. However, this approach is largely unexplored in the context of quantum materials, which are traditionally grown to be as pristine and clean as possible. Here we show that plastic deformation induces robust magnetism in the quantum paraelectric SrTiO 3 , a property that is completely absent in the pristine material. We combine scanning magnetic measurements and near-field optical microscopy to find that the magnetic order is localized along dislocation walls and coexists with ferroelectric order along the walls. The magnetic signals can be switched on and off via external stress and altered by external electric fields, which demonstrates that plastically deformed SrTiO 3 is a quantum multiferroic. These results establish plastic deformation as a versatile knob for the manipulation of the electronic properties of quantum materials.
(© 2024. The Author(s).)
Databáze: MEDLINE
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