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| Auteurs principaux: | , , , , , , , , , , , , , |
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| Format: | Preprint |
| Publié: |
2023
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| Accès en ligne: | https://arxiv.org/abs/2305.05801 |
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| _version_ | 1866910339772186624 |
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| author | Zhang, Delin Jiang, Wei Yun, Hwanhui Benally, Onri Jay Peterson, Thomas Cresswell, Zach Fan, Yihong Lv, Yang Yu, Guichuan Barriocanal, Javier Garcia Swatek, Przemyslaw Mkhoyan, K. Andre Low, Tony Wang, Jian-Ping |
| author_facet | Zhang, Delin Jiang, Wei Yun, Hwanhui Benally, Onri Jay Peterson, Thomas Cresswell, Zach Fan, Yihong Lv, Yang Yu, Guichuan Barriocanal, Javier Garcia Swatek, Przemyslaw Mkhoyan, K. Andre Low, Tony Wang, Jian-Ping |
| contents | Contrary to topological insulators, topological semimetals possess a nontrivial chiral anomaly that leads to negative magnetoresistance and are hosts to both conductive bulk states and topological surface states with intriguing transport properties for spintronics. Here, we fabricate highly-ordered metallic Pt3Sn and Pt3SnxFe1-x thin films via sputtering technology. Systematic angular dependence (both in-plane and out-of-plane) study of magnetoresistance presents surprisingly robust quadratic and linear negative longitudinal magnetoresistance features for Pt3Sn and Pt3SnxFe1-x, respectively. We attribute the anomalous negative longitudinal magnetoresistance to the type-II Dirac semimetal phase (pristine Pt3Sn) and/or the formation of tunable Weyl semimetal phases through symmetry breaking processes, such as magnetic-atom doping, as confirmed by first-principles calculations. Furthermore, Pt3Sn and Pt3SnxFe1-x show the promising performance for facilitating the development of advanced spin-orbit torque devices. These results extend our understanding of chiral anomaly of topological semimetals and can pave the way for exploring novel topological materials for spintronic devices. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2305_05801 |
| institution | arXiv |
| publishDate | 2023 |
| record_format | arxiv |
| spellingShingle | Robust negative longitudinal magnetoresistance and spin-orbit torque in sputtered Pt3Sn topological semimetal Zhang, Delin Jiang, Wei Yun, Hwanhui Benally, Onri Jay Peterson, Thomas Cresswell, Zach Fan, Yihong Lv, Yang Yu, Guichuan Barriocanal, Javier Garcia Swatek, Przemyslaw Mkhoyan, K. Andre Low, Tony Wang, Jian-Ping Materials Science Contrary to topological insulators, topological semimetals possess a nontrivial chiral anomaly that leads to negative magnetoresistance and are hosts to both conductive bulk states and topological surface states with intriguing transport properties for spintronics. Here, we fabricate highly-ordered metallic Pt3Sn and Pt3SnxFe1-x thin films via sputtering technology. Systematic angular dependence (both in-plane and out-of-plane) study of magnetoresistance presents surprisingly robust quadratic and linear negative longitudinal magnetoresistance features for Pt3Sn and Pt3SnxFe1-x, respectively. We attribute the anomalous negative longitudinal magnetoresistance to the type-II Dirac semimetal phase (pristine Pt3Sn) and/or the formation of tunable Weyl semimetal phases through symmetry breaking processes, such as magnetic-atom doping, as confirmed by first-principles calculations. Furthermore, Pt3Sn and Pt3SnxFe1-x show the promising performance for facilitating the development of advanced spin-orbit torque devices. These results extend our understanding of chiral anomaly of topological semimetals and can pave the way for exploring novel topological materials for spintronic devices. |
| title | Robust negative longitudinal magnetoresistance and spin-orbit torque in sputtered Pt3Sn topological semimetal |
| topic | Materials Science |
| url | https://arxiv.org/abs/2305.05801 |