Abstract
We experimentally study the thermoelectrical signature of individual skyrmions in chiral Pt/Co/Ru multilayers. Using a combination of controlled nucleation, single skyrmion annihilation, and magnetic field dependent measurements the thermoelectric signature of individual skyrmions is characterized. The observed signature is explained by the anomalous Nernst effect of the skyrmion's spin structure. Possible topological contributions to the observed thermoelectrical signature are discussed. Such thermoelectrical characterization allows for noninvasive detection and counting of skyrmions and enables fundamental studies of topological thermoelectric effects on the nanoscale.
Highlights
Skyrmions are nanoscale topologically nontrivial spin structures which are inherently robust due to their particular topology and can be driven efficiently by electrical currents [1,2,3], with potential applications in logic and storage devices and neuromorphic computing [4]
We experimentally study the thermoelectrical signature of individual skyrmions in chiral Pt=Co=Ru multilayers
Their electrical characterization and manipulation have been investigated intensely over recent years [5,6,7,8,9,10,11,12,13,14] leading to observations such as the skyrmion Hall effect [15,16] and the topological Hall effect [14,17]
Summary
Alexander Fernández Scarioni ,1 Craig Barton ,2 Hector Corte-León ,2 Sibylle Sievers ,1 Xiukun Hu ,1 Fernando Ajejas ,3 William Legrand ,3 Nicolas Reyren ,3 Vincent Cros,. Possible topological contributions to the observed thermoelectrical signature are discussed Such thermoelectrical characterization allows for noninvasive detection and counting of skyrmions and enables fundamental studies of topological thermoelectric effects on the nanoscale. In conventional spintronic materials thermoelectric studies have led to important discoveries such as the tunneling magneto-Seebeck effect [22] or spin heat accumulation [23] and have enabled nanoscale detection of domain wall motion [24] Such thermoelectric studies could shine light on topological contributions to the Nernst effect [25] and might provide new tools for skyrmion detection and manipulation. In this Letter, we experimentally study the thermoelectrical signature of individual skyrmions in a Pt=Co=Ru multilayer microstripe and attribute it unambiguously to the anomalous Nernst effect (ANE) originating from the spin structure of the skyrmion without significant topological. In our study the saturation condition is denoted by Mz 1⁄4 Ms, the saturation magnetization
Sign-in/Register to view highlights & summary Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
