Physics – Condensed Matter – Mesoscale and Nanoscale Physics
Scientific paper
2011-05-10
Physics
Condensed Matter
Mesoscale and Nanoscale Physics
9 pages, 15 figures
Scientific paper
The study of two-dimensional (2D) electronic systems is of great fundamental significance in physics. Atomic layers containing hybridized domains of graphene and hexagonal boron nitride (h-BNC) constitute a new kind of disordered 2D electronic system. Magneto-electric transport measurements performed at low temperature in vapor phase synthesized h-BNC atomic layers show a clear and anomalous transition from an insulating to a metallic behavior upon cooling. The observed insulator to metal transition can be modulated by electron and hole doping and by the application of an external magnetic field. These results supported by ab-initio calculations suggest that this transition in h-BNC has distinctly different characteristics when compared to other 2D electron systems and is the result of the coexistence between two distinct mechanisms, namely, percolation through metallic graphene networks and hopping conduction between edge states on randomly distributed insulating h-BN domains.
Ajayan Pulickel M.
Balicas Luis
Capaz Rodrigo. B.
Ci Lijie
Jariwala Deep
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