Soft breakdown of an insulating nanowire in an electric field

Q. Sun, Q. Wang, Y. Kawazoe, P. Jena

研究成果: Article査読

15 被引用数 (Scopus)


The study of the properties of nanostructures in an electric field is very important not only from the fundamental point of view but also for practical applications. According to classical physics, an insulating system will be broken down in a large electric field. Can we predict such a behaviour for nanostructures using ab initio calculation? Such an attempt is made in this paper. The electronic structure and charge distributions of the thinnest (SiO2)n wire in electric field are studied in detail with a first-principles method. It is found that the HOMO-LUMO gap increases with size and saturates at large values of 6.4 eV when n ≥ 12, suggesting that the SiO2 chain can be a very good insulating nanowire. However, when the wire is in an applied electric field, the HOMO and LUMO energies of the wire decrease linearly at different speeds, and the gap approaches zero, at which point the insulating wire is broken down by the electric field.

出版ステータスPublished - 2004 3月

ASJC Scopus subject areas

  • バイオエンジニアリング
  • 化学 (全般)
  • 材料科学(全般)
  • 材料力学
  • 機械工学
  • 電子工学および電気工学


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