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Calendar of Physics Talks Vienna
| Topological and helical spin structures in centrosymmetric perovskite-type oxides |
| Speaker: | Shintaro Ishiwata (Osaka University) |
| Abstract: | After the brief review of our recent works, I will show the topologically nontrivial helimagnetic phases in the simple cubic perovskite SrFeO3, which were discovered by SARS measurements. We found that SrFeO3 shows two kinds of multiple-q helimagnetic structures: an anisotropic double-q spin spiral and an isotropic quadruple-q spiral hosting a three-dimensional lattice of topological singularities. As a related topic, our recent discoveries of novel helimagnetic phases in the perovskites Sr1-xBaxCoO3 and Sr1-xCaxCoO3 will be also presented. Based on the first-principles calculations, the results will be discussed in terms of the competing magnetic order in the Co-O lattice.
Full abstract:
https://www.ifp.tuwien.ac.at/fileadmin/seminar/200203_Ishiwata_abs.pdf
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| Date: | Mon, 03.02.2020 |
| Time: | 11:00 |
| Duration: | 45 min |
| Location: | Institut für Festkörperphysik, Wiedner Hauptstraße 8-10, Seminarraum roter Bereich, 7. OG |
| Contact: | Andrei Pimenov |
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