Spin Hall magnetoresistance at the altermagnetic insulator/Pt interface
Fuente:
arXiv
Enregistré dans:
| Auteurs principaux: | , , , , , , , , , , , , , , , , , , , , , , , , |
|---|---|
| Format: | Preprint |
| Publié: |
2025
|
| Sujets: | |
| Accès en ligne: | |
| Tags: |
Ajouter un tag
Pas de tags, Soyez le premier à ajouter un tag!
|
| _version_ | 1866915526535544832 |
|---|---|
| author | Leiviskä, Miina Firouzmandi, Reza Ahn, Kyo-Hoon Kubaščik, Peter Soban, Zbynek Bommanaboyena, Satya Prakash Müller, Christoph Kriegner, Dominik Sailler, Sebastian Lammel, Michaela Bestha, Kranthi Kumar Šmejkal, Libor Zelezny, Jakub Wolter, Anja U. B. Scheufele, Monika Fischer, Johanna Opel, Matthias Geprägs, Stephan Althammer, Matthias Büchner, Bernd Jungwirth, Tomas Nádvorník, Lukáš Goennenwein, Sebastian T. B. Kocsis, Vilmos Reichlová, Helena |
| author_facet | Leiviskä, Miina Firouzmandi, Reza Ahn, Kyo-Hoon Kubaščik, Peter Soban, Zbynek Bommanaboyena, Satya Prakash Müller, Christoph Kriegner, Dominik Sailler, Sebastian Lammel, Michaela Bestha, Kranthi Kumar Šmejkal, Libor Zelezny, Jakub Wolter, Anja U. B. Scheufele, Monika Fischer, Johanna Opel, Matthias Geprägs, Stephan Althammer, Matthias Büchner, Bernd Jungwirth, Tomas Nádvorník, Lukáš Goennenwein, Sebastian T. B. Kocsis, Vilmos Reichlová, Helena |
| contents | The resistance of a heavy metal can be modulated by an adjacent magnetic material through the combined effects of the spin Hall effect, inverse spin Hall effect, and dissipation of the spin accumulation at the interface. This phenomenon is known as the spin Hall magnetoresistance. The dissipation of the spin accumulation can occur via various mechanisms, with spin-transfer torque being the most extensively studied. In this work, we report the observation of spin Hall magnetoresistance at the interface between platinum and an insulating altermagnetic candidate, Ba$_2$CoGe$_2$O$_7$. Our findings reveal that this heterostructure exhibits a relatively large spin Hall magnetoresistance signal, which is anisotropic with respect to the crystal orientation of the current channel. We explore and rule out several potential explanations for this anisotropy and propose that our results may be understood in the context of the anisotropies of the spin current channels across the Pt/altermagnetic Ba$_2$CoGe$_2$O$_7$ interface. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2501_19198 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | Spin Hall magnetoresistance at the altermagnetic insulator/Pt interface Leiviskä, Miina Firouzmandi, Reza Ahn, Kyo-Hoon Kubaščik, Peter Soban, Zbynek Bommanaboyena, Satya Prakash Müller, Christoph Kriegner, Dominik Sailler, Sebastian Lammel, Michaela Bestha, Kranthi Kumar Šmejkal, Libor Zelezny, Jakub Wolter, Anja U. B. Scheufele, Monika Fischer, Johanna Opel, Matthias Geprägs, Stephan Althammer, Matthias Büchner, Bernd Jungwirth, Tomas Nádvorník, Lukáš Goennenwein, Sebastian T. B. Kocsis, Vilmos Reichlová, Helena Mesoscale and Nanoscale Physics The resistance of a heavy metal can be modulated by an adjacent magnetic material through the combined effects of the spin Hall effect, inverse spin Hall effect, and dissipation of the spin accumulation at the interface. This phenomenon is known as the spin Hall magnetoresistance. The dissipation of the spin accumulation can occur via various mechanisms, with spin-transfer torque being the most extensively studied. In this work, we report the observation of spin Hall magnetoresistance at the interface between platinum and an insulating altermagnetic candidate, Ba$_2$CoGe$_2$O$_7$. Our findings reveal that this heterostructure exhibits a relatively large spin Hall magnetoresistance signal, which is anisotropic with respect to the crystal orientation of the current channel. We explore and rule out several potential explanations for this anisotropy and propose that our results may be understood in the context of the anisotropies of the spin current channels across the Pt/altermagnetic Ba$_2$CoGe$_2$O$_7$ interface. |
| title | Spin Hall magnetoresistance at the altermagnetic insulator/Pt interface |
| topic | Mesoscale and Nanoscale Physics |
| url | https://arxiv.org/abs/2501.19198 |