Scattering-induced and highly tunable by gate damping-like spin-orbit torque in graphene doubly proximitized by two-dimensional magnet Cr2Ge2Te6 and monolayer WS2
| Author(s) | Zollner, Klaus | |
| Author(s) | Petrović, Marko D. | |
| Author(s) | Dolui, Kapildeb | |
| Author(s) | Plecháč, Petr | |
| Author(s) | Nikolić, Branislav K. | |
| Author(s) | Fabian, Jaroslav | |
| Date Accessioned | 2022-03-30T13:11:48Z | |
| Date Available | 2022-03-30T13:11:48Z | |
| Publication Date | 2020-10-09 | |
| Description | This article was originally published in Physical Review Research. The version of record is available at: https://doi.org/10.1103/PhysRevResearch.2.043057 | en_US |
| Abstract | Graphene sandwiched between semiconducting monolayers of ferromagnet Cr2Ge2Te6 and transition-metal dichalcogenide WS2 acquires both spin-orbit (SO) coupling, of valley-Zeeman and Rashba types, and exchange coupling. Using first principles combined with quantum transport calculations, we predict that such doubly proximitized graphene within van der Waals heterostructure will exhibit SO torque driven by unpolarized charge current. This system lacks spin Hall current which is putatively considered as necessary for the efficient damping-like (DL) SO torque that plays a key role in magnetization switching. Instead, it demonstrates how a DL SO torque component can be generated solely by skew scattering off spin-independent potential barrier or impurities in purely two-dimensional electronic transport due to the presence of proximity SO coupling and its spin texture tilted out of plane. This leads to current-driven nonequilibrium spin density emerging in all spatial directions, whose cross product with proximity magnetization yields DL SO torque, unlike the ballistic regime with no scatterers in which only field-like (FL) SO torque appears. In contrast to SO torque on conventional metallic ferromagnets in contact with three-dimensional SO-coupled materials, the ratio of FL and DL components of SO torque can be tuned by more than an order of magnitude via combined top and back gates. | en_US |
| Sponsor | K.Z. and J.F. were supported by the Deutsche Forschungsgemeinschaft (DFG, German Research Foundation) SFB 1277 (Project Id. No. 314695032) and SPP 1666. M.D.P. and P.P. were supported by ARO MURI Award No. W911NF-14-0247. K.D. and B.K.N. were supported by the U.S. Department of Energy (DOE) Grant No. DE-SC0016380. The supercomputing time was provided by XSEDE, which is supported by the U.S. National Science Foundation (NSF) Grant No. ACI-1053575. | en_US |
| Citation | Zollner, Klaus, Marko D. Petrović, Kapildeb Dolui, Petr Plecháč, Branislav K. Nikolić, and Jaroslav Fabian. “Scattering-Induced and Highly Tunable by Gate Damping-like Spin-Orbit Torque in Graphene Doubly Proximitized by Two-Dimensional Magnet Cr2Ge2Te6 and monolayer WS2.” Phys. Rev. Research 2, no. 4 (October 2020): 043057. https://doi.org/10.1103/PhysRevResearch.2.043057. | en_US |
| ISSN | 2643-1564 | |
| URL | https://udspace.udel.edu/handle/19716/30725 | |
| Language | en_US | en_US |
| Publisher | Physical Review Research | en_US |
| Title | Scattering-induced and highly tunable by gate damping-like spin-orbit torque in graphene doubly proximitized by two-dimensional magnet Cr2Ge2Te6 and monolayer WS2 | en_US |
| Type | Article | en_US |
Files
Original bundle
1 - 1 of 1
Loading...
- Name:
- Scattering-induced and highly tunable by gate damping.pdf
- Size:
- 3.43 MB
- Format:
- Adobe Portable Document Format
- Description:
- Main article
License bundle
1 - 1 of 1
No Thumbnail Available
- Name:
- license.txt
- Size:
- 2.22 KB
- Format:
- Item-specific license agreed upon to submission
- Description: