2022/01/07 by Satoru Hayami
Materials Science · Physics and Astronomy · #Condensed matter physics #Frustration #Geometrical frustration #Magnet #Magnetic Properties of Alloys #Magnetic and transport properties of perovskites and related materials #Magnetic properties of thin films #Materials science #Phase (matter) #Physics #Quantum mechanics #Skyrmion #Tetragonal crystal system #Theoretical physics #cond-mat.str-el
paper · pdf · doi:10.7566/jpsj.91.023705
published as J. Phys. Soc. Jpn. 91, 023705 (2022) · 6 pages, 4 figures
arxiv created 2022/01/07 · openalex publication_date 2022/01/24 · arxiv updated 2022/03/04 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/06
A skyrmion crystal (SkX) expressed as a multiple number of spiral modulations manifests itself not only in its peculiar magnetic texture but also in nontrivial transport properties originating from an emergent magnetic field. We here report our numerical results for multiple SkXs in a centrosymmetric tetragonal crystal system. By performing simulated annealing for an effective spin model for itinerant magnets, we find that three types of the SkXs with the skyrmion numbers of one and two, which are characterized by different superpositions of helices, are stabilized in the ground state, and are transformed by an external magnetic field. The essence of the emergent multiple SkXs is lied in itinerant frustration where exchange interactions are competed in momentum space due to the nature of itinerant electrons.