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Title: Gateable skyrmion transport via field-induced potential barrier modulation
Authors: Fook, Hiu Tung
Gan, Wei Liang
Lew, Wen Siang
Keywords: DRNTU::Science::Physics
Magnetic Skyrmions
Computational nanotechnology
Issue Date: 2016
Source: Fook, H. T., Gan, W. L., & Lew, W. S. (2016). Gateable skyrmion transport via field-induced potential barrier modulation. Scientific Reports, 6, 21099-. doi:10.1038/srep21099
Series/Report no.: Scientific Reports
Abstract: We report on the influence of pinning potentials on current-driven skyrmion dynamics and demonstrate that skyrmions can be gated via either magnetic or electric fields. When encountering pinning potentials, skyrmions are well known to simply skirt around them. However, we show that skyrmions can be depinned much more easily when their driving force is oriented against the pinning site rather that the intuitive option of being oriented away. This observation can be exploited together with the normally undesirable Magnus force for the creation of a skyrmion diode. The phenomenon is explained by the increased skyrmion compression resulting from the spin transfer torque opposing the repulsive potential. The smaller skyrmion size then experiences a reduced pinning potential. For practical low-power device applications, we show that the same skyrmion compression can be recreated by applying either a magnetic or electric field. Our analysis provides an insight on the skyrmion dynamics and manipulation that is critical for the realization of skyrmion-based transistors and low-power memory.
DOI: 10.1038/srep21099
Schools: School of Physical and Mathematical Sciences 
Rights: © 2016 The Authors (Nature Publishing Group). This work is licensed under a Creative Commons Attribution 4.0 International License. The images or other third party material in this article are included in the article’s Creative Commons license, unless indicated otherwise in the credit line; if the material is not included under the Creative Commons license, users will need to obtain permission from the license holder to reproduce the material. To view a copy of this license, visit
Fulltext Permission: open
Fulltext Availability: With Fulltext
Appears in Collections:SPMS Journal Articles

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