Electrical Conduction of Graphene Doped with Nitrogen
S. P. Repetskyy, O. V. Tretyak, I. G. Vyshyvana, V. A. Skotnykov, A. A. Yatsenyuk
Taras Shevchenko National University of Kyiv, 64 Volodymyrska Str., 01601 Kyiv, Ukraine
Received: 15.05.2014. Download: PDF
Based on the tight-binding model, the electronic structure of graphene doped with N atoms is investigated. Wave function of $2s$-, $2p$-states of non-interacting neutral C atoms are chosen. Within the calculation of the Hamiltonian matrix elements, the first three co-ordination spheres are taken into account. As found, the zones’ hybridization leads to a splitting of the energy spectrum of electrons in the Fermi energy region. With increasing of nitrogen-atoms’ concentration, the conductivity of graphene decreases. As the nitrogen atoms concentration increases, the electron density of states at the Fermi level increases; so, decreasing of conductivity is caused by much greater decrease of relaxation time of electron states.
Key words: graphene doped with nitrogen, electron energy spectrum, electrical conduction, tight-binding model.
PACS: 71.15.Ap, 71.20.Tx, 71.27.+a, 72.10.-d, 72.80.Vp, 73.22.Pr, 81.05.ue
Citation: S. P. Repetskyy, O. V. Tretyak, I. G. Vyshyvana, V. A. Skotnykov, and A. A. Yatsenyuk, Electrical Conduction of Graphene Doped with Nitrogen, Metallofiz. Noveishie Tekhnol., 36, No. 8: 1015—1022 (2014) (in Ukrainian)