The formation of an energy gap in graphene on ruthenium by controlling the interface

被引：161

作者：

Enderlein, C. ^{[1
,2
]}

Kim, Y. S. ^{[1
]}

Bostwick, A. ^{[1
]}

Rotenberg, E. ^{[1
]}

Horn, K. ^{[2
]}

机构：

[1] Univ Calif Berkeley, Lawrence Berkeley Lab, Adv Light Source, Berkeley, CA 94720 USA

[2] Max Planck Gesell, Fritz Haber Inst, D-1000 Berlin, Germany

来源：

NEW JOURNAL OF PHYSICS | 2010年 / 12卷

关键词：

EPITAXIAL GRAPHENE; ELECTRONIC-STRUCTURE; BANDGAP; ORIGIN;

D O I：

10.1088/1367-2630/12/3/033014

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

In this work, we have investigated the spectral function of graphene on a monolayer of intercalated gold on Ru(0001) using angle-resolved photoemission spectroscopy (ARPES). The intercalation leads to a decoupling of the graphene film, as documented by emergence of the characteristic linear pi-bands near the Fermi level. However, a band gap at the band crossing is observed. We relate this gap opening to the broken symmetry of the two carbon sublattices, induced by the special lattice mismatch of the graphene and the intercalated gold monolayer.

引用

页数：9

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