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Neel- and Bloch-Type Magnetic Vortices in Rashba Metals
| Title: | Neel- and Bloch-Type Magnetic Vortices in Rashba Metals |
| Authors: | Hayami, Satoru Browse this author | | Motome, Yukitoshi Browse this author |
| Keywords: | Magnetic vortices | | RKKY interaction | | Rashba coupling | | Skyrmions | | Kondo lattice model |
| Issue Date: | 25-Sep-2018 |
| Publisher: | American Physical Society (APS) |
| Journal Title: | Physical Review Letters |
| Volume: | 121 |
| Issue: | 13 |
| Start Page: | 137202 |
| Publisher DOI: | 10.1103/PhysRevLett.121.137202 |
| PMID: | 30312100 |
| Abstract: | We theoretically study noncoplanar spin textures in polar magnetic conductors. Starting from the Kondo lattice model with the Rashba spin-orbit coupling, we derive an effective spin model with generalized Ruderman-Kittel-Kasuya-Yosida interactions including the anisotropic and antisymmetric exchange interactions. By performing simulated annealing for the effective model, we find that a vortex crystal of Neel type is stabilized even in the absence of a magnetic field. Moreover, we demonstrate that a Bloch-type vortex crystal, which is usually associated with the Dresselhaus spin-orbit coupling, can also be realized in our Rashba-based model. A magnetic field turns the vortex crystals into Neel- and Bloch-type Skyrmion-like crystals. Our results underscore that the interplay between the spin-orbit coupling and itinerant magnetism brings fertile possibilities of noncoplanar magnetic orderings. |
| Rights: | ©2018 American Physical Society |
| Type: | article |
| URI: | http://hdl.handle.net/2115/72032 |
| Appears in Collections: | 理学院・理学研究院 (Graduate School of Science / Faculty of Science) > 雑誌発表論文等 (Peer-reviewed Journal Articles, etc)
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Submitter: 速水 賢
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