A1 Journal article (refereed)
Superconducting Triplet Rim Currents in a Spin-Textured Ferromagnetic Disk (2022)
Fermin, R., van Dinter, D., Hubert, M., Woltjes, B., Silaev, M., Aarts, J., & Lahabi, K. (2022). Superconducting Triplet Rim Currents in a Spin-Textured Ferromagnetic Disk. Nano Letters, 22(6), 2209-2216. https://doi.org/10.1021/acs.nanolett.1c04051
JYU authors or editors
Publication details
All authors or editors: Fermin, Remko; van Dinter, Dyon; Hubert, Michel; Woltjes, Bart; Silaev, Mikhail; Aarts, Jan; Lahabi, Kaveh
Journal or series: Nano Letters
ISSN: 1530-6984
eISSN: 1530-6992
Publication year: 2022
Publication date: 03/03/2022
Volume: 22
Issue number: 6
Pages range: 2209-2216
Publisher: American Chemical Society (ACS)
Publication country: United States
Publication language: English
DOI: https://doi.org/10.1021/acs.nanolett.1c04051
Publication open access: Openly available
Publication channel open access: Partially open access channel
Publication is parallel published (JYX): https://jyx.jyu.fi/handle/123456789/80191
Abstract
Since the discovery of the long-range superconducting proximity effect, the interaction between spin-triplet Cooper pairs and magnetic structures such as domain walls and vortices has been the subject of intense theoretical discussions, while the relevant experiments remain scarce. We have developed nanostructured Josephson junctions with highly controllable spin texture, based on a disk-shaped Nb/Co bilayer. Here, the vortex magnetization of Co and the Cooper pairs of Nb conspire to induce long-range triplet (LRT) superconductivity in the ferromagnet. Surprisingly, the LRT correlations emerge in highly localized (sub-80 nm) channels at the rim of the ferromagnet, despite its trivial band structure. We show that these robust rim currents arise from the magnetization texture acting as an effective spin–orbit coupling, which results in spin accumulation at the bilayer–vacuum boundary. Lastly, we demonstrate that by altering the spin texture of a single ferromagnet, both 0 and π channels can be realized in the same device.
Keywords: superconductors; superconductivity; nanotechnology; magnetism; physics
Contributing organizations
Related projects
- Spin-kinetiikka suprajohteissa ja topologisissa supranesteissä
- Silaev, Mikhail
- Research Council of Finland
Ministry reporting: Yes
Reporting Year: 2022
JUFO rating: 3