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Zhang D, Jiang W, Yun H, Benally OJ, Peterson T, Cresswell Z, Fan Y, Lv Y, Yu G, Barriocanal JG, Swatek PW, Mkhoyan KA, Low T, Wang JP. Robust negative longitudinal magnetoresistance and spin-orbit torque in sputtered Pt 3Sn and Pt 3Sn xFe 1-x topological semimetal. Nat Commun 2023; 14:4151. [PMID: 37438330 DOI: 10.1038/s41467-023-39408-2] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/20/2022] [Accepted: 06/13/2023] [Indexed: 07/14/2023] Open
Abstract
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.
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Affiliation(s)
- Delin Zhang
- Department of Electrical and Computer Engineering, University of Minnesota, Minneapolis, MN, 55455, USA.
| | - Wei Jiang
- Department of Electrical and Computer Engineering, University of Minnesota, Minneapolis, MN, 55455, USA
| | - Hwanhui Yun
- Department of Chemical Engineering and Materials Science, University of Minnesota, Minneapolis, MN, 55455, USA
| | - Onri Jay Benally
- Department of Electrical and Computer Engineering, University of Minnesota, Minneapolis, MN, 55455, USA
| | - Thomas Peterson
- School of Physics and Astronomy, University of Minnesota, Minneapolis, MN, 55455, USA
| | - Zach Cresswell
- Department of Electrical and Computer Engineering, University of Minnesota, Minneapolis, MN, 55455, USA
| | - Yihong Fan
- Department of Electrical and Computer Engineering, University of Minnesota, Minneapolis, MN, 55455, USA
| | - Yang Lv
- Department of Electrical and Computer Engineering, University of Minnesota, Minneapolis, MN, 55455, USA
| | - Guichuan Yu
- Characterization Facility, University of Minnesota, Minneapolis, MN, 55455, USA
| | | | | | - K Andre Mkhoyan
- Department of Chemical Engineering and Materials Science, University of Minnesota, Minneapolis, MN, 55455, USA
| | - Tony Low
- Department of Electrical and Computer Engineering, University of Minnesota, Minneapolis, MN, 55455, USA.
| | - Jian-Ping Wang
- Department of Electrical and Computer Engineering, University of Minnesota, Minneapolis, MN, 55455, USA.
- Department of Chemical Engineering and Materials Science, University of Minnesota, Minneapolis, MN, 55455, USA.
- School of Physics and Astronomy, University of Minnesota, Minneapolis, MN, 55455, USA.
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