Document Type
Article
Original Publication Date
2010
Journal/Book/Conference Title
Physical Review B
Volume
81
Issue
8
DOI of Original Publication
10.1103/PhysRevB.81.085442
Date of Submission
April 2015
Abstract
First-principles calculations based on density-functional theory reveal some unusual properties of BN sheet functionalized with hydrogen and fluorine. These properties differ from those of similarly functionalized graphene even though both share the same honeycomb structure. (1) Unlike graphene which undergoes a metal to insulator transition when fully hydrogenated, the band gap of the BN sheet significantly narrows when fully saturated with hydrogen. Furthermore, the band gap of the BN sheet can be tuned from 4.7 to 0.6 eV and the system can be a direct or an indirect semiconductor or even a half-metal depending on surface coverage. (2) Unlike graphene, the hydrogenation of BN sheet is endothermic. (3) Unlike graphene, BN sheet has heteroatomic composition. When codecorated with H and F, it can lead to anisotropic structures with rich electronic and magnetic properties. (4) Unlike graphene, BN sheets can be made ferromagnetic, antiferromagnetic, or magnetically degenerate depending on how the surface is functionalized. (5) The stability of magnetic coupling of functionalized BN sheet can be further modulated by applying external strain. Our study highlights the potential of functionalized BN sheets for unusual applications.
Rights
Zhou, J., Wang, Q., Sun, Q., et al. Electronic and magnetic properties of a BN sheet decorated with hydrogen and fluorine. Physical Review B, 81, 085442 (2010). Copyright © 2010 American Physical Society.
Is Part Of
VCU Physics Publications
Comments
Originally published by the American Physical Society at: http://dx.doi.org/10.1103/PhysRevB.81.085442