Photoinduced Topological Spin Texture in a Metallic Ferromagnet
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説明
Photoinduced nonequilibrium spin structure is examined in the double-exchange model, in which itinerant electrons couple with localized spins through the ferromagnetic Hund coupling. In particular, we focus on the transient spin structure from the initial ferromagnetic metallic state to the steady antiferromagnetic ordered state reported in [Phys. Rev. Lett. 119, 207202 (2017)]. By solving the Schr��dinger equation combined with the Landau-Lifshitz-Gilbert equation, we find finite winding number and chirality, which implies emergence of topological chiral spin textures. These observations are reproduced by a calculation where spin dynamics after sudden quench of the chemical potential are examined in larger clusters. A possible mechanism of the topological spin texture in the transient dynamics is discussed.
5 pages, 4 figures
収録刊行物
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- Journal of the Physical Society of Japan
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Journal of the Physical Society of Japan 88 (2), 023703-, 2019-02
Tokyo : Physical Society of Japan
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詳細情報 詳細情報について
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- CRID
- 1520573330563815552
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- NII論文ID
- 40021810026
- 210000135082
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- NII書誌ID
- AA00704814
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- ISSN
- 00319015
- 13474073
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- NDL書誌ID
- 029517099
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- 本文言語コード
- en
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- 資料種別
- journal article
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- NDL 雑誌分類
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- ZM35(科学技術--物理学)
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- データソース種別
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- NDLサーチ
- Crossref
- CiNii Articles
- KAKEN
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