Dirac Cones and Minigaps for Graphene on Ir(111)

被引：498

作者：

Pletikosic, I. ^{[1
]}

Kralj, M. ^{[1
]}

Pervan, P. ^{[1
]}

Brako, R. ^{[2
]}

Coraux, J. ^{[3
]}

N'Diaye, A. T. ^{[3
]}

Busse, C. ^{[3
]}

Michely, T. ^{[3
]}

机构：

[1] Inst Fiz, Zagreb 10000, Croatia

[2] Rudjer Boskovic Inst, Zagreb 10000, Croatia

[3] Univ Cologne, Inst Phys 2, D-50937 Cologne, Germany

来源：

PHYSICAL REVIEW LETTERS | 2009年 / 102卷 / 05期

关键词：

EPITAXIAL GRAPHENE; FILMS; GRAPHITE; BANDGAP; SURFACE;

D O I：

10.1103/PhysRevLett.102.056808

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

Epitaxial graphene on Ir(111) prepared in excellent structural quality is investigated by angle-resolved photoelectron spectroscopy. It clearly displays a Dirac cone with the Dirac point shifted only slightly above the Fermi level. The moire resulting from the overlaid graphene and Ir(111) surface lattices imposes a superperiodic potential giving rise to Dirac cone replicas and the opening of minigaps in the band structure.

引用

页数：4

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*EPAPS, EPRLTAO102054908 EPA, P77207

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