Nonlocal exchange interaction removes half-metallicity in graphene nanoribbons

被引：189

作者：

Rudberg, Elias ^{[1
]}

Salek, Pawel ^{[1
]}

Luo, Yi ^{[1
]}

机构：

[1] Royal Inst Technol, Dept Theoret Phys, S-10691 Stockholm, Sweden

来源：

NANO LETTERS | 2007年 / 7卷 / 08期

关键词：

D O I：

10.1021/nl070593c

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

Band gap studies of zigzag-edge graphene ribbons are presented. While earlier calculations at LDA level show that zigzag-edge graphene ribbons become half-metallic when cross-ribbon electric fields are applied, our calculations with hybrid density functional demonstrate that finite graphene ribbons behave as half-semiconductors. The spin-dependent band gap can be changed in a wide range, making possible many applications in spintronics.

引用

页码：2211 / 2213

页数：3

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