New class of high-Tc diluted ferromagnetic semiconductors based on CaO without transition metal elements
New class of high-Tc diluted ferromagnetic semiconductors based on CaO without transition metal elements
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DOI：
10.1007/s10948-005-2147-7
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发表时间：
2005-02-01
期刊：
影响因子：
--
通讯作者：
Katayama-Yoshida, H
中科院分区：
文献类型：
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作者：
Kemmochi, K;Seike, M;Katayama-Yoshida, H
我们提出了基于 CaO 和 K2S 且不含任何过渡金属元素的新型铁磁半导体。如果由C、N、Si或Ge杂质掺杂引起的深杂质带宽（W）和电子相关能（U）满足斯通纳高相关电子系统条件（U > W），这些材料就会表现出透明的半金属铁磁性。根据我们的第一性原理计算，我们证明这些材料满足斯托纳条件，并且可以成为透明和半金属 DMS 的新候选材料。
We propose new-type ferromagnetic semiconductors based on CaO and K2S without any transition metal elements. These materials show transparent and half-metallic ferromagnetism if the deep-impurity-band width (W) induced by doping of C, N, Si, or Ge impurities, and the electron-correlation energy (U) satisfy the Stoner's condition of highly correlated electron system (U > W). Based on our first-principles calculations, we demonstrate that these materials satisfy the Stoner's condition, and could be new candidates for transparent and half-metallic DMSs.