CoMnCrGaにおける異常ホール効果、ネルンスト効果、スピンホール効果:第一原理計算による研究
Anurodh Sharma1, Srivani Javvaji2, Lakhansingh Kowachi3
1Pure and Applied Physics, Guru Ghasidas Vishwavidyalaya, Koni, Bilaspur, Chhattisgarh, 495009, INDIA.
まとめ
4元ホイスラー化合物CoMnCrGaは、スピントロニクスおよび熱電変換デバイスの可能性を示しています。その高いスピン分極と調整可能な異常ネルンスト伝導率は、高度なアプリケーションに理想的です。
科学分野:
- 物性物理学
- 材料科学
- スピントロニクス
背景:
- 4元ホイスラー化合物は、高度な電子アプリケーションのために探求されています。
- スピントロニクスデバイスには、高いスピン分極と効率的なスピン-電荷変換を持つ材料が必要です。
研究 の 目的:
- 第一原理計算を用いてCoMnCrGaの電子的および輸送特性を調査すること。
- スピントロニクスおよび横断熱電変換アプリケーションの可能性を評価すること。
主な方法:
- 包括的な第一原理計算が採用されました。
- 電子バンド構造とベリー曲率が分析されました。
- 異常ホールおよびネルンスト伝導率が計算されました。
主要な成果:
- CoMnCrGaは、ほぼ半金属的特性と高いスピン分極を持つ強磁性基底状態を示します。
- フェルミ準位近傍で有意な異常ホールおよびネルンスト伝導率が予測されました。
- 強いスピン軌道結合とベリー曲率により、大きなスピンホール伝導率が観測されました。
結論:
- CoMnCrGaは、スピントロニクスおよびスピンカロリトロニクスデバイスの有望な材料です。
- その調整可能な異常ネルンスト伝導率と堅牢な強磁性が主な利点です。
- この材料は、次世代の熱電変換およびスピントロニクスアプリケーションの可能性を提供します。
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