Transition barriers between topological spin textures can be tailored

This study explores the stabilities of various topological spin textures in chiral magnets, such as chiral bobbers, dipole strings, and skyrmion tubes, against homochiral states. The study demonstrates multiple transition paths among these textures mediated by Bloch-point singularities and how the energy landscape of a magnetic system can be tailored by modulating local material properties. The key findings include the identification of ground-state chiral bobbers and the manipulation of stabilities and transition barriers of these textures. This research emphasizes the importance of understanding the energy barriers of transitions for the robustness of specific textures against external excitations, especially thermal fluctuations. It suggests that the topological protection property assists in maintaining the topological charge in a depth-dependent manner. Our study may have implications for future applications in spintronics-based information carriers.

Reference
Tailoring energy barriers of Bloch-point-mediated transitions between topological spin textures
Y. Li^*, Y. Zang, R. Chen, and C. Moutafis^*
Physical Review B, 2024.