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

A. L. Rakhmanov, A. V. Rozhkov, A. O. Sboychakov, Franco Nori

Research output: Contribution to journalArticlepeer-review

16 Citations (Scopus)

Abstract

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.

Original languageEnglish
Article number035408
JournalPhysical Review B - Condensed Matter and Materials Physics
Volume85
Issue number3
DOIs
Publication statusPublished - 6 Jan 2012
Externally publishedYes

Fingerprint

Dive into the research topics of 'Phase separation of hydrogen atoms adsorbed on graphene and the smoothness of the graphene-graphane interface'. Together they form a unique fingerprint.

Cite this