Search for ferromagnetism in transition-metal-doped piezoelectric ZnO
Search for ferromagnetism in transition-metal-doped piezoelectric ZnO
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DOI：
10.1103/physrevb.69.125201
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发表时间：
2004-03-01
影响因子：
3.7
通讯作者：
Spaldin, NA
中科院分区：
文献类型：
--
作者：
Spaldin, NA
我们目前的计算研究结果的ZnO中存在的Co和Mn替代杂质。我们的工作的目标是确定潜在的铁磁基态内的（Zn，Co）O或（Zn，Mn）O材料系统，也是很好的候选人压电。我们发现，强大的铁磁性是不是通过取代钴或锰的锌网站上，除非额外的载体（孔）也纳入。这与在稀磁半导体中需要载流子来诱导铁磁性的传统观点是一致的，但与以前对该系统的理论预测相反[K. Sato和H.日本片山吉田J.应用物理学，Part 2 39，L555（2000）; K. Sato和H. Katayama-Yoshida，Phys. StatusSolidi B 229，673（2002）]。我们提出了一个实用的方案，实现这种p型掺杂ZnO。
We present results of a computational study of ZnO in the presence of Co and Mn substitutional impurities. The goal of our work is to identify potential ferromagnetic ground states within the (Zn,Co)O or (Zn,Mn)O material systems that are also good candidates for piezoelectricity. We find that robust ferromagnetism is not obtained by substitution of Co or Mn on the Zn site, unless additional carriers (holes) are also incorporated. This is consistent with the conventional wisdom that carriers are required to induce ferromagnetism in diluted magnetic semiconductors, but in contrast to a previous theoretical prediction for this system [K. Sato and H. Katayama-Yoshida, Jpn. J. Appl. Phys., Part 2 39, L555 (2000); K. Sato and H. Katayama-Yoshida, Phys. Status Solidi B 229, 673 (2002)]. We propose a practical scheme for achieving such p-type doping in ZnO.