$T_{\text{c}}$-Enhanced Codoping Method for GaAs-Based Dilute Magnetic Semiconductors
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概要
- 論文の詳細を見る
Based on ab initio calculations of Ga1-xMnxNyAs1-y and Ga1-xMnxCyAs1-y, we propose a new codoping method to enhance the Curie temperature $T_{\text{c}}$ of diluted magnetic semiconductors. The solubility of Mn can be increased up to high concentration by the codoping of N or C to reduce the lattice and volume expansion caused by Mn doping. It is found that the impurity band of the majority spin is strongly broadened and pushed up into the higher energy region due to the strong $p$-$d$ hybridization caused by the codoping, and the $T_{\text{c}}$ becomes higher than the room temperature at $x>6$%.
- Japan Society of Applied Physicsの論文
- 2003-08-01
著者
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Dinh Van
Department Of Condensed Matter Physics Osaka University:department Of Computational Nanomaterials De
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SATO Kazunori
Institut fur Festkorperforchung, Forschungszentrum Julich
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Katayama-Yoshida Hiroshi
Department of Computational Nanomaterials Design, Nanoscience and Nanotechnology Center, The Institute of Scientific and Industrial Research (ISIR), Osaka University, 8-1 Mihogaoka, Ibaraki, Osaka 567-0047, Japan
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Katayama-Yoshida Hiroshi
Department of Condensed Matter Physics, Osaka University, 8-1 Mihogaoka, Ibaraki, Osaka 567-0047, Japan
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Dinh Van
Department of Condensed Matter Physics, Osaka University, 8-1 Mihogaoka, Ibaraki, Osaka 567-0047, Japan
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Sato Kazunori
Institut für Festkörperforchung, Forschungszentrum Jülich, D-52425 Jülich, Germany
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