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終結アニオン層間の間隙アニオン:S0.24 ((NH3) 0.26Fe2Se2における異常なイオンS-Se結合と穴ドーピング誘発超伝導
Ruijin Sun1,2, Shifeng Jin1,2, Lin Gu1,2
1Institute of Physics , Chinese Academy of Science , Beijing 100190 , China.
Journal of the American Chemical Society
|July 30, 2019
まとめ
研究者はアニオンを 層状の材料に挿入する新しい方法を開発し 新しい化合物を生み出しました この画期的な発見により 穴埋め鉄カルコゲニドの 超伝導性が初めて実現した.
科学分野:
- 材料科学
- 固体化学
- 超伝導性
背景:
- アニオンインターケレーションは高度な材料にとって重要ですが,アニオンに富んだ宿主にとっては困難です.
- 層状の鉄セレニド (FeSe) は,そのアニオン外層のためにアニオンインターキャレーションに困難を伴う.
研究 の 目的:
- 層状の材料にアニオンを挿入するための新しい合成を開発する.
- 新しい (Se/S) x ((NH3) yFe2Se2化合物を独特のアニオン-アニオン結合で作成する.
- 超伝導性の出現を調査する
主な方法:
- 水熱イオン交換合成を用いて,SとSeアニオンをFeSeにインターケラ化した.
- 結束と電荷移転の分析を含む単結晶の特徴.
- 合成材料の超伝導性に関する研究.
主要な成果:
- FeSe層にSとSeアニオンの成功インターケレーションにより,新しい化合物 (Se/S) x (NH3) yFe2Se2が形成されます.
- 強いイオン特性を持つ異常なアニオン-アニオン結合の観測
- 高いFe酸化状態と支配的な穴のキャリアによって確認された電荷移転の証拠.
- 超伝導性の出現は,穴ドーピングされた鉄カルコゲン化物で,Sインターケレーションによる.
結論:
- アニオンインターキャレーションのための多用途の水熱イオン交換法が確立されています.
- この研究は,アニオン-アニオン結合と,層状の材料における電荷移転の可能性を示しています.
- この研究は,アニオン間隔と超伝導性を関連材料で探求するための新しい道を開きます.
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