Phase separation of hydrogen atoms adsorbed on graphene and the smoothness of the graphene-graphane interface

被引：15
|
作者：
Rakhmanov, A. L. [1 ,2 ]
Rozhkov, A. V. [1 ,2 ]
Sboychakov, A. O. [1 ,2 ]
Nori, Franco [1 ,3 ]
机构：
[1] RIKEN, Adv Sci Inst, Wako, Saitama 3510198, Japan
[2] Russian Acad Sci, Inst Theoret & Appl Electrodynam, Moscow 125412, Russia
[3] Univ Michigan, Dept Phys, Ann Arbor, MI 48109 USA
来源：
PHYSICAL REVIEW B | 2012年 / 85卷 / 03期
基金：
日本学术振兴会;
关键词：
ELECTRON CORRELATIONS;
D O I：
10.1103/PhysRevB.85.035408
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
The electronic properties of a graphene sheet with attached hydrogen atoms are studied using a modified Falicov-Kimball model on the honeycomb lattice. It is shown that in the ground state this system separates into two phases: fully hydrogenated graphene (graphane) and hydrogen-free graphene. The graphene-graphane boundary acquires a positive interface tension. Therefore, the graphene-graphane interface becomes a straight line, slightly rippled by thermal fluctuations. A smooth interface may be useful for the fabrication of mesoscopic graphene-based devices.
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页数：6
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