鉄系超伝導体LaFePO_0.9の高エネルギースピン揺らぎ

• 石角 元志

  総合科学研究機構 中性子科学センター

書誌事項

タイトル別名

• High-energy Spin Fluctuation in Iron-based Superconductor LaFePO_0.9
• 鉄系超伝導体LaFePO[0.9]の高エネルギースピン揺らぎ
• テツケイ チョウデンドウタイ LaFePO[0.9]ノ コウエネルギースピン ユラギ

抄録

Spin fluctuations are widely believed to play an important role in the superconducting mechanisms of unconventional high-temperature superconductors, and they have been observed in various iron-based superconductors so far. However, in LaFePO_0.9, they have not been observed by inelastic neutron scattering. LaFePO_0.9 is an iron-based superconductor with a low superconducting transition temperature (T_c = 5 K), where line nodes are observed in the superconducting order parameter. The line-node symmetry typically originates from sign reversal of the order parameter in spin-fluctuation-mediated superconductivity. This contradiction has been a longstanding mystery of this superconductor. Here, we report spin fluctuations were found at high energies such as 30-50 meV. The line-node symmetry can be explained naturally as spin-fluctuation-mediated superconductivity.

収録刊行物

• 波紋

  波紋 29 (4), 187-191, 2019-11-10

  日本中性子科学会

キーワード

• iron-based superconductor
• high-energy spin fluctuation
• inelastic neutron scattering

詳細情報

• CRID: 1390286426518463104
• NII論文ID: 130007949163
• NII書誌ID: AA11905115
• DOI: 10.5611/hamon.29.4_187
• ISSN: 1884636X
• ISSN: 1349046X
• NDL書誌ID: 030113086
• Web Site: https://ndlsearch.ndl.go.jp/books/R000000004-I030113086
• Web Site: https://www.jstage.jst.go.jp/article/hamon/29/4/29_187/_pdf
• 本文言語コード: ja
• データソース種別:
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