[20p-E216-8~20] 10.2 Fundamental and exploratory device technologies for spin

△ [20p-E216-14] Topological Hall Effects and Topological Spin Hall Effects Caused by a Skyrmion

〇(M2)Yuichi Ishida¹, Kenji Kondo¹ (1.Hokkaido Univ.)

Keywords:Topological Hall effect, Topological spin Hall effect, Skyrmion

Topological Hall effects (THE) and topological spin Hall effects (TSHE) can occur when there exist skyrmions in a ferromagnet. This is because the skyrmions create an emergent magnetic field affecting itinerant electrons and this field has opposite direction to each other for itinerant electrons with different spins. In our study, we investigate THE and TSHE for Néel-type and Bloch-type skyrmions using the tight binding model, respectively. In the case of both the skyrmions, we have obtained almost identical results and the fact that topological Hall angles and topological spin Hall angles strongly depend on the fermi energy of itinerant electrons. This result implies that the fermi energy is an important factor to apply skyrmions to spintronics devices. At the conference, we are going to discuss the results of both the skyrmions in detail.