Автори | D.M. Sergeyev1, 2 |
Афіліація |
1Zhubanov Aktobe Regional University, 34, Moldagulova Ave., 030000 Aktobe, Kazakhstan 2Begeldinov Military Institute of Air Defence Forces, 39, Moldagulova Ave., 030012 Aktobe, Kazakhstan |
Е-mail | serdau@rambler.ru |
Випуск | Том 10, Рік 2018, Номер 3 |
Дати | Одержано 22.02.2018; у відредагованій формі – 05.06.2018; опубліковано online 25.06.2018 |
Цитування | D.M. Sergeyev, J. Nano- Electron. Phys. 10 No 3, 03018 (2017) |
DOI | https://doi.org/10.21272/jnep.10(3).03018 |
PACS Number(s) | 73.63. – b, 61.72.J – |
Ключові слова | Graphene (23) , Stone-Wales defect (3) , Density of states (6) , Current-voltage characteristic (12) , Differential conductivity (3) , Transmission spectra (4) . |
Анотація |
In the framework of the density functional theory, using the method of nonequilibrium Green's functions and in the local density approximation, the electrical characteristics of various configurations of graphene with a Stone-Wales defect are investigated. The calculation is implemented in the Atomistix ToolKit with Virtual NanoLab program. The current-voltage, dI/dV-characteristics, the transmission spectrum and the density of states of the nanostructures under consideration are calculated. At an energy of ~ 0.5 eV, a band consisting of two peaks, characteristic for Stone-Wales defects, appears on the density of states. This "defect band" can be useful for recognizing such defects, as well as for determining their concentration in a graphene film. It is shown that on the current-voltage characteristics of defective graphene structures, a region with a negative differential resistance appears, possibly due to resonant tunneling of quasiparticles. The same changes are also observed on the dI/dV-characteristic. The obtained results can be useful for calculations of new promising electronic devices of nanoelectronics based on graphene. |
Перелік посилань English version of article |