半導体内の個々のドーパントの刺激と磁化を検出する

Alexander A Khajetoorians¹, Bruno Chilian, Jens Wiebe

¹Institute of Applied Physics, Hamburg University, Jungiusstrasse 11, D-20355 Hamburg, Germany.

Nature

|October 29, 2010

まとめ

研究者は,半導体内の単一の磁性原子のスピンを電気的に制御し,読み取りました. この画期的な発見は,スピントロニックデバイスと量子コンピューティングのための磁気の原子レベルの研究を可能にします.

科学分野:

スピントロニクス (Spintronics) は,スピントロニクス (Spintronics) を開発したものです.
量子コンピューティング
凝縮物質物理学凝縮物質物理学
マテリアルサイエンス材料科学

背景:

半導体内の個々の磁性原子は,スピントロニックデバイスと量子論理の鍵です.
稀な磁性半導体における原子スケールの磁性を理解することは極めて重要です.
以前の研究では,ドーパント構造と磁性を結びつけるための原子解像度が欠けていました.

研究の目的:

半導体内の単一の磁気ドーパントのスピンの電気刺激と読み取りを示すために.
原子レベルで個々のドーパントの磁気特性を調査する.
先進的な技術を使用して,ドーパント磁気と原子構造を相関させる.

主な方法:

スピン解像度スキャントンネリングスペクトロスコーピー (SR-STS) が採用されました.
単原子スピン状態の電気刺激と読み取りが行われました.
裏付けとして,第一原則の計算を用いた.

主要な成果:

インジウムアンチモニドで単一の鉄ドーパントのスピンの電気制御と読み取りを成功裏に達成しました.
個々の表面ドーパントの測定されたスピン刺激と磁化曲線.
量子スピン状態に影響を与える実質的な磁性アニソトロピーを特定しました.

結論:

この研究は,半導体内の単一の磁気ドーパントを検出するための新しい方法論を示しています.
この技術は,スピントロニクスにとって極めて重要な磁力の原子規模の調査を可能にします.
GaAsのMnやダイヤモンドのNVセンターなどの様々な磁気システムを研究するための道を開きます.

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