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Measuring Magnetically-Tuned Ferroelectric Polarization in Liquid Crystals
Published on: August 15, 2018
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スピン氷における磁気モノポールの電荷と電流の測定
S T Bramwell1, S R Giblin, S Calder
1London Centre for Nanotechnology and Department of Physics and Astronomy, University College London, 17-19 Gordon Street, London WC1H 0AH, UK. s.t.bramwell@ucl.ac.uk
Nature
|October 16, 2009
まとめ
研究者は,実験的に磁気電荷と電流を測定し,磁気電荷と電流を測定した.
科学分野:
- 凝縮物質物理学 凝縮物質物理学
- マグネチズム (磁気) とは
- 新興現象は,新興現象である.
背景:
- 電気電荷の輸送は,技術と生物学にとって根本的なものです.
- よく定義された磁性準粒子がないため,磁性電荷輸送は十分に理解されていません.
- 磁気モノポールに類似するエマージント磁気電荷は,特定の材料で理論的に提案されています.
研究 の 目的:
- 実験的に磁気電荷とその動態 ("磁気性") を直接測定する.
- 磁気電荷を検出するための材料独立の方法を開発する.
- "スピンアイス"材料の磁気電荷の性質を調査する.
主な方法:
- 磁気電荷の測定のためにオンスァーガーの電解質の理論を適用した.
- 地元の探査機としてミューオン・スピン・ローテーション・スペクトロスコピーを利用しました.
- 開発した方法をDy(2)Ti(2)O(7) のスピンアイスに適用しました.
主要な成果:
- 磁気電荷の存在がDy(2) Ti(2) O(7) で確認されました.
- 磁気電荷がクーロン電位を通じて相互作用し,測定可能な電流を発揮することを実証した.
- オームの法則からの偏差を特徴付け,基本的な磁気電荷単位を決定した.
- 電気と磁気間の定量的な対称性を確立した.
結論:
- 磁気電荷と電流 ("磁気性") は,実験的に検証可能な現象である.
- 開発された方法は,新興磁気現象を研究するための経路を提供します.
- この研究は,電気および磁気電荷輸送の間の基本的な対称性を明らかにします.
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