We found a match
Your institution may have access to this item. Find your institution then sign in to continue.
- Title
Robust negative longitudinal magnetoresistance and spin–orbit torque in sputtered Pt<sub>3</sub>Sn and Pt<sub>3</sub>Sn<sub>x</sub>Fe<sub>1-x</sub> topological semimetal.
- Authors
Zhang, Delin; Jiang, Wei; Yun, Hwanhui; Benally, Onri Jay; Peterson, Thomas; Cresswell, Zach; Fan, Yihong; Lv, Yang; Yu, Guichuan; Barriocanal, Javier Garcia; Swatek, Przemyslaw Wojciech; Mkhoyan, K. Andre; Low, Tony; Wang, Jian-Ping
- 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. Negative longitudinal magnetoresistance refers to a decrease in resistance with the external magnetic field when the field direction is applied parallel to the current direction. It is considered an experimental signature of topological semimetals. Here, Zhang et al find clear and robust quadratic and linear negative longitudinal magnetoresistance in Pt3Sn and Pt3SnxFe1-x films.
- Subjects
MAGNETORESISTANCE; TOPOLOGICAL insulators; SPIN-orbit interactions; SURFACE states; TORQUE; MAGNETIC fields; CHIRALITY of nuclear particles
- Publication
Nature Communications, 2023, Vol 14, Issue 1, p1
- ISSN
2041-1723
- Publication type
Article
- DOI
10.1038/s41467-023-39408-2