Direct imaging and control of Berry curvature in noncollinear antiferromagnetic single-crystal thin films
Fuente:
arXiv
Guardado en:
| Autores principales: | , , , , , , , , , , , , , |
|---|---|
| Formato: | Preprint |
| Publicado: |
2024
|
| Materias: | |
| Acceso en línea: | |
| Etiquetas: |
Agregar Etiqueta
Sin Etiquetas, Sea el primero en etiquetar este registro!
|
| _version_ | 1866917032997421056 |
|---|---|
| author | Yao, Yuchuan Pal, Pratap Farhang, Camron Lu, Weihang Elekhtiar, Mohamed Lenharth, Paul Campbell, Neil G. Gurung, Gautam Johnson, Roger D. Manuel, Pascal Rzchowski, Mark S. Tsymbal, Evgeny Y. Xia, Jing Eom, Chang-Beom |
| author_facet | Yao, Yuchuan Pal, Pratap Farhang, Camron Lu, Weihang Elekhtiar, Mohamed Lenharth, Paul Campbell, Neil G. Gurung, Gautam Johnson, Roger D. Manuel, Pascal Rzchowski, Mark S. Tsymbal, Evgeny Y. Xia, Jing Eom, Chang-Beom |
| contents | The discovery of the intrinsic anomalous Hall effect (AHE) in noncollinear antiferromagnets where transverse Hall voltage emerges without magnetic field, has opened a plethora of promising opportunities in antiferromagnetic devices. The key challenges limiting their full potential are (1) high-quality epitaxial thin-film growth and (2) the understanding of Berry curvature domain physics. Here, we focus on a noncollinear antiperovskite antiferromagnet Mn3NiN as a model system, successfully grown as a single-crystal epitaxial thin film. Combining multiple experiments supported by theoretical calculations, we probe the Berry curvature associated with antiferromagnetic Γ4g domains in Mn3NiN and its strong connection to an AHE. We directly image the intrinsic Berry curvature with high-resolution Sagnac microscopy, controlling spatial distribution and dynamics by varying temperature and applied magnetic fields. We discover that the Γ4g domains are switchable near the Néel transition, but become frozen and unresponsive to external stimuli at low temperature. This behavior enables the tuning of Berry-curvature driven AHE and magneto-optic Kerr effect responses through controlled experimental conditions. Our findings provide critical advancement of the fundamental understanding and wide tunability of Berry curvature in noncollinear antiferromagnets important for realization in potential spintronic applications. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2410_02990 |
| institution | arXiv |
| publishDate | 2024 |
| record_format | arxiv |
| spellingShingle | Direct imaging and control of Berry curvature in noncollinear antiferromagnetic single-crystal thin films Yao, Yuchuan Pal, Pratap Farhang, Camron Lu, Weihang Elekhtiar, Mohamed Lenharth, Paul Campbell, Neil G. Gurung, Gautam Johnson, Roger D. Manuel, Pascal Rzchowski, Mark S. Tsymbal, Evgeny Y. Xia, Jing Eom, Chang-Beom Materials Science Strongly Correlated Electrons The discovery of the intrinsic anomalous Hall effect (AHE) in noncollinear antiferromagnets where transverse Hall voltage emerges without magnetic field, has opened a plethora of promising opportunities in antiferromagnetic devices. The key challenges limiting their full potential are (1) high-quality epitaxial thin-film growth and (2) the understanding of Berry curvature domain physics. Here, we focus on a noncollinear antiperovskite antiferromagnet Mn3NiN as a model system, successfully grown as a single-crystal epitaxial thin film. Combining multiple experiments supported by theoretical calculations, we probe the Berry curvature associated with antiferromagnetic Γ4g domains in Mn3NiN and its strong connection to an AHE. We directly image the intrinsic Berry curvature with high-resolution Sagnac microscopy, controlling spatial distribution and dynamics by varying temperature and applied magnetic fields. We discover that the Γ4g domains are switchable near the Néel transition, but become frozen and unresponsive to external stimuli at low temperature. This behavior enables the tuning of Berry-curvature driven AHE and magneto-optic Kerr effect responses through controlled experimental conditions. Our findings provide critical advancement of the fundamental understanding and wide tunability of Berry curvature in noncollinear antiferromagnets important for realization in potential spintronic applications. |
| title | Direct imaging and control of Berry curvature in noncollinear antiferromagnetic single-crystal thin films |
| topic | Materials Science Strongly Correlated Electrons |
| url | https://arxiv.org/abs/2410.02990 |