Will zigzag graphene nanoribbon turn to half metal under electric field?

被引：294

作者：

Kan, Er-Jun ^{[1
]}

Li, Zhenyu ^{[1
]}

Yang, Jinlong ^{[1
]}

Hou, J. G. ^{[1
]}

机构：

[1] Univ Sci & Technol China, Hefei Natl Lab Phys Sci Microscale, Hefei 230026, Anhui, Peoples R China

来源：

APPLIED PHYSICS LETTERS | 2007年 / 91卷 / 24期

基金：

中国国家自然科学基金;

关键词：

D O I：

10.1063/1.2821112

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

At B3LYP level of theory, we predict that the half-metallicity in zigzag edge graphene nanoribbon (ZGNR) can be realized when an external electric field is applied across the ribbon. The critical electric field decreases with the increase of the ribbon width to induce the half-metallicity. Both the spin polarization and half-metallicity are removed when the edge state electrons fully transferred from one side to the other under very strong electric field. The electric field range under which ZGNR remains half-metallic increases with the ribbon width. Our study demonstrates a rich field-induced spin polarization behavior, which may lead to some important applications in spinstronics. (C) 2007 American Institute of Physics.

引用

页数：3

共 19 条

[11] Electronic structure and magnetic properties of graphitic ribbons [J].