Interface-induced magnetic polar metal phase in complex oxides
| Autor: | Aafreen Fathima, Zhen Wang, Mohammad Saghayezhian, Jiandi Zhang, Sokrates T. Pantelides, Joel Taylor, Rongying Jin, Saurabh Ghosh, Meng Meng, E. W. Plummer, Yimei Zhu, Hangwen Guo |
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| Jazyk: | angličtina |
| Rok vydání: | 2019 |
| Předmět: |
Materials science
Electronic properties and materials Science Oxide General Physics and Astronomy 02 engineering and technology 01 natural sciences General Biochemistry Genetics and Molecular Biology Article Metal Magnetization chemistry.chemical_compound Condensed Matter::Materials Science Surfaces interfaces and thin films Magnetic properties and materials Lattice (order) 0103 physical sciences 010306 general physics lcsh:Science Saturation (magnetic) Multidisciplinary Condensed matter physics Heterojunction General Chemistry 021001 nanoscience & nanotechnology Ferromagnetism chemistry visual_art visual_art.visual_art_medium Polar Condensed Matter::Strongly Correlated Electrons lcsh:Q 0210 nano-technology |
| Zdroj: | Nature Communications, Vol 10, Iss 1, Pp 1-7 (2019) Nature Communications |
| ISSN: | 2041-1723 |
| DOI: | 10.1038/s41467-019-13270-7 |
| Popis: | Polar metals are commonly defined as metals with polar structural distortions. Strict symmetry restrictions make them an extremely rare breed as the structural constraints favor insulating over metallic phase. Moreover, no polar metals are known to be magnetic. Here we report on the realization of a magnetic polar metal phase in a BaTiO3/SrRuO3/BaTiO3 heterostructure. Electron microscopy reveals polar lattice distortions in three-unit-cells thick SrRuO3 between BaTiO3 layers. Electrical transport and magnetization measurements reveal that this heterostructure possesses a metallic phase with high conductivity and ferromagnetic ordering with high saturation moment. The high conductivity in the SrRuO3 layer can be attributed to the effect of electrostatic carrier accumulation induced by the BaTiO3 layers. Density-functional-theory calculations provide insights into the origin of the observed properties of the thin SrRuO3 film. The present results pave a way to design materials with desired functionalities at oxide interfaces. Polar metals—metals with polar structural distortions—are known not to be magnetic. Here, the authors demonstrate a magnetic polar metal phase in a BaTiO3/SrRuO3/BaTiO3 heterostructure displaying high conductivity and ferromagnetic ordering with high saturation moment. |
| Databáze: | OpenAIRE |
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