Journal
NANO LETTERS
Volume 7, Issue 8, Pages 2211-2213Publisher
AMER CHEMICAL SOC
DOI: 10.1021/nl070593c
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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.
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