Journal
COMPUTATIONAL MATERIALS SCIENCE
Volume 81, Issue -, Pages 551-555Publisher
ELSEVIER SCIENCE BV
DOI: 10.1016/j.commatsci.2013.09.014
Keywords
Boron nitride nanoribbons; Band structure; Doping; Magnetic moment; Density functional theory
Categories
Funding
- National Science Foundation of China [11174289, 11104276]
- special Funds for Major State Basic Research Project of China (973) [2012CB933702]
- Knowledge Innovation Program of Chinese Academy of Sciences [KJCX2-YW-N35]
- Hefei Center for Physical Science and Technology [2012FXZY004]
- Anhui Provincial Natural Science Foundation [2013AKZR0074]
- Fundamental Research Funds for the Central Universities
- CASHIPS
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We report a first-principles investigation on the tuning effects of carbon dopants on the electronic structures and magnetic properties of zigzag boron nitride nanoribbons (ZBNNRs). In particular, 10-ZBNNR is considered and a supercell with five unit cells is adopted in the calculations. When the supercell is doped by one carbon (C) atom, the dopant tends to substitute the edge atom resulting in a 0.625 mu B magnetic moment on the dopant and the system becomes a magnetic semiconductor. By changing the dopant position, namely, from the edge to the ribbon center, the nanoribbon transforms from a magnetic semiconductor into a metal. If the edges of the supercell are doped by two C atoms, the nanoribbons become a nonmagnetic semiconductor. With the increase of the dopant concentration, the conductivity of the ZBNNRs can be greatly improved. Especially, with careful design of the dopant distribution, half-metallic ZBNNRs can be achieved. (C) 2013 Elsevier B.V. All rights reserved.
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