Skyrmion Crystals in Frustrated Shastry–Sutherland Magnets. Issue 11 (24th May 2019)

• Record Type: Journal Article
• Authors: Yu, Jianhe; Li, Weihao; Huang, Zongpeng; Liang, Jinjing; Chen, Jun; Chen, Deyang; Hou, Zhipeng; Qin, Minghui
• Is Part Of: Physica status solidi. Volume 13:Issue 11(2019)
• Page Start: n/a
• Page End: n/a
• Publication Date: 2019-05-24
• Subjects: Dzyaloshinskii–Moriya interaction -- frustration -- Shastry–Sutherland model -- skyrmions; Solid state physics -- Periodicals; 530.4105
• DOI: 10.1002/pssr.201900161
• Languages: English
• ISSNs: 1862-6254

Abstract

Abstract : The phase diagrams of the frustrated classical spin model with the Dzyaloshinskii–Moriya (DM) interaction on the Shastry–Sutherland lattice are studied by means of Monte Carlo simulations. For ferromagnetic next‐nearest‐neighboring ( J 2 ) interactions, the introduced exchange frustration enhances the effect of the DM interaction, which enlarges the magnetic field‐range with the skyrmion lattice phase and increases the skyrmion density. For antiferromagnetic J 2 interactions, the so‐called 2 q phase (two‐sublattice skyrmion crystal) and the spin‐flop phase are observed, and their stabilizations are closely dependent on the DM interaction and J 2 interaction, respectively. The simulated results are qualitatively explained from the energy competitions among these couplings, which provide an important guidance for finding skyrmion crystals in frustrated magnets. Abstract : In frustrated Shastry–Sutherland magnets, the introduced exchange frustration enhances the effect of Dzyaloshinskii–Moriya interaction, which not only enlarges the magnetic field region with skyrmion lattice phase in the simulated phase diagram at low temperatures, but also increases the density of the skyrmions. This work provides an important guidance for finding skyrmion crystals in frustrated magnets.