吸附在石墨烯上的氢原子的相分离及石墨烯-石墨烯界面的光滑性
Phase separation of hydrogen atoms adsorbed on graphene and the smoothness of the graphene-graphane interface
摘要：
采用改进的Falicov-Kimball模型，在蜂窝晶格上研究了附着氢原子的石墨烯片的电子性质.结果表明，在基态，该系统分为两个阶段：完全氢化的石墨烯（石墨烷）和无氢石墨烯。石墨烯-石墨烯边界获得正的界面张力。因此，石墨烯-石墨烯界面变成一条直线，由于热波动而略微波动。光滑界面可用于制造介观石墨烯基器件。
英文摘要：
The electronic properties of a graphene sheet with attached hydrogen atoms is 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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