期刊
RSC ADVANCES
卷 5, 期 24, 页码 18352-18358出版社
ROYAL SOC CHEMISTRY
DOI: 10.1039/c4ra13522a
关键词
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资金
- NSFC [21203096, 11374160, 11404278]
- NSF of Jiangsu Province [BK20130031, BK2012392]
- Fundamental Research Funds for the Central Universities [30920130111016]
- New Century Excellent Talents in University [NCET-12-0628]
- Qinglan Project of Jiangsu Province
- NUST Research Funding [AB41374]
- Shanghai Supercomputer Center
Two-dimensional (2D) magnetic materials are the focus of one of the most active areas of nano-materials research. However, most of them contain d electrons in the hosts or dopants which may lead to extrinsic magnetic behavior. Here we report a density functional study on the structural, electronic, and magnetic properties of an AlN monolayer (ML) doped with first-row atoms of X (X = Be, B, and C), which are free of d electrons. The calculations reveal that Be and C dopants, which substitute Al and N atoms respectively, can induce local spin moments, while B (for N) cannot lead to spin polarization in the AlN ML. More importantly, for Be doped AlN ML, a half-metallic ferromagnetism is observed, and the estimated Curie temperature is higher than room temperature. The long-range ferromagnetic coupling between doped Be atoms can be explained by a hole-mediated p-p interaction. Thus, our results provide a promising way toward 2D magnetic materials.
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