期刊
APPLIED PHYSICS LETTERS
卷 102, 期 7, 页码 -出版社
AMER INST PHYSICS
DOI: 10.1063/1.4793204
关键词
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资金
- National Natural Science Foundation of China (NSFC) [51072066, 50772041]
- Specialized Research Fund for the Doctoral Program of Higher Education [20100061110083]
- Program for New Century Excellent Talents in University [NCET-06-0303]
In this paper, we study the effects of semi-hydrogenation (SH) and full-hydrogenation (FH) on the structural evolution and properties of two-dimensional (2D) diamond nanofilms by first-principles calculations. Both the hydrogenation processes play an important role in stabilizing the 2D diamond structures. For the FH cases, the direct bandgaps are localized in the region of 2.54-3.55 eV and decreased following an inverse law with layer number (n). For the SH cases, a ferrimagnetism characteristic is presented determining by the unpaired electrons on the un-hydrogenated side, and the spin-related bandgaps are in an infrared region of 0.74-1.17 eV, which are strongly dependent on n. As a result, the hydrogenation is favorable for tuning the electronic and magnetic properties of 2D diamond nanofilms to achieve high performance diamond-based nanodevices. (C) 2013 American Institute of Physics. [http://dx.doi.org/10.1063/1.4793204]
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