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説明
Excitations of two-dimensional skyrmion lattice are theoretically studied based on a collective coordinate description. Starting from the representation of skyrmion lattice in terms of three helices, we identify the canonical coordinates describing low energy excitations as phasons. The phason excitation spectra turn out to have one gapless mode with a quadratic dispersion and one massive mode, in agreement with previous studies. We will show that there is another collective mode governing the topological nature and the stability of skyrmion lattice and that the fluctuation of this mode leads to a screening of the topological charge of the lattice. Experimental implications of the screening effect in microwave absorption, topological Hall effect and depinning threshold current in metals are discussed.
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 83 (10), 104711-, 2014-10
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
- 1522825130279179264
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- NII論文ID
- 40020226397
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- NII書誌ID
- AA00704814
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- ISSN
- 00319015
- 13474073
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- NDL書誌ID
- 025841966
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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
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