Electric Transport Properties of a Model Nanojunction graphene-Fullerene C 6 0 -Graphene
Sergeyev D. Ashikov N. Zhanturina N.
February 2021World Scientific
International Journal of Nanoscience
2021#20Issue 1
In the framework of the density functional theory and method of nonequilibrium Green functions (DFT + NEGF), the electric transport properties of the model nanojunction Graphene-Fullerene C60-Graphenewere studied. The transmission spectra, the density of states, the current-voltage characteristic (CVC) and the differential conductivity of the nanojunction are determined. The appearance of a feature of the DOS nanotransition is revealed. This is due to the fact that the Lowest Unoccupied Molecular Orbital (LUMO) of C60 becomes closer to the Fermi level of metal substrates than its Highest Occupied Molecular Orbital (HOMO). It is shown that Coulomb stairs associated with the Coulomb blockade effect appear on the CVC of the nanotransition. The same changes are observed on the differential conductivity spectrum in the form of eight distinct peak structures arising with period ΔV≈0.683V. The comparison of the electric transport characteristics of single-fullerene nanodevices with various electrode materials (graphene, gold, platinum) are presented. It was found that the voltage period of Coulomb features ΔV in a nanodevice with graphene electrodes is less than in nanodevices with platinum and gold electrodes. It was revealed that the considered nanotransition has negative differential conductivity. The results obtained can be useful in calculating promising elements of single-electronics.
Coulomb blockade , Coulomb staircase , current-voltage characteristic , differential conductivity , electron transport , Fullerene-graphene nanojunction
Text of the article Перейти на текст статьи
Department of Physics, K. Zhubanov Aktobe Regional State University, 34 Moldagulova avenue, Aktobe, 030000, Kazakhstan
Department of Radio Electronics, T. Begeldinov Aktobe Avation Institute, 39 Moldagulova avenue, Aktobe, 030012, Kazakhstan
Department of Physics
Department of Radio Electronics
10 лет помогаем публиковать статьи Международный издатель
Книга Публикация научной статьи Волощук 2026 Book Publication of a scientific article 2026