Electron states in boron nitride nanocones

被引:44
作者
Azevedo, S [1 ]
Mazzoni, MSC [1 ]
Chacham, H [1 ]
Nunes, RW [1 ]
机构
[1] Univ Fed Minas Gerais, ICEX, Dept Fis, BR-30123970 Belo Horizonte, MG, Brazil
关键词
D O I
10.1063/1.1565701
中图分类号
O59 [应用物理学];
学科分类号
摘要
We apply first-principles calculations to study the electronic structure of boron nitride nanocones with disclinations of different angles theta = n pi/3. Nanocones with odd values of n present antiphase boundaries that cause a reduction of the work function of the nanocones, relative to the bulk BN value, by as much as 2 eV. In contrast, nanocones with even values of n do not have such defects and present work functions that are very similar to the BN bulk value. These results should have strong consequences for the field emission properties of boron nitride nanocones and nanotubes. (C) 2003 American Institute of Physics.
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页码:2323 / 2325
页数:3
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