物理学报Issue(5)：398-404,7.DOI:10.7498/aps.62.057302
氮化硼纳米片的电子结构和自旋调控
Electronic structure and spin-polarization of boron-nitride nanoflake
摘要
Abstract
Boron-nitride graphene-like monolayer possesses a similar atomic arrangement to that of the famous graphene. However, due to the large difference in electronegetivity between boron and nitrogen atoms, the electronic properties of the two nanomaterials are different significantly. Here, we report on our theoretical investigation of the electronic structure and spin-polarization of zigzag-edged boron-nitride triangular nanoflake using a Hubbard model and the first-principles calculations within density-functional theory. Our numerical results indicate that in contrast to graphene nanoflake with spin-polarized ground state, the boron-nitride nanoflak has the zero-energy state that is either empty or fully occupied, and its ground state is thus spin-unpolarized which breaks the Lieb’s law. However, the electron occupation and spin-polarization of the zero-energy state of boron-nitride nanoflake can be tuned by doping it with electrons or holes. These results are expected to offer the theoretical basis for the applications of boron-nitride nanomaterials in spintronics.关键词
氮化硼纳米片/电子结构调控/Hubbard模型/量子力学第一性原理Key words
boron-nitride nanoflakes/electronic structure modification/hubbard model/first-principles calculations引用本文复制引用
王道俊..氮化硼纳米片的电子结构和自旋调控[J].物理学报,2013,(5):398-404,7.基金项目
广东省高等学校人才引进专项资金项目和华南农业大学校长科学基金资助的课题.Project supported by the Guangdong Higher Educational Special Fund for the Introduction of Talents and by the Principal Science Foundation of South China Agricultural University （）
