About Coherent Electron Transport in Nanocontacts “Nb – DNA – Nb”
| Authors | D. Sergeyev1, 2 , N. Tumyshev2 |
| Affiliations |
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 |
| Issue | Volume 10, Year 2018, Number 5 |
| Dates | Received 12 August 2018; revised manuscript received 24 October 2018; published online 29 October 2018 |
| Citation | D. Sergeyev, N. Tumyshev, J. Nano- Electron. Phys. 10 No 5, 05027 (2018) |
| DOI | https://doi.org/10.21272/jnep.10(5).05027 |
| PACS Number(s) | 73.63. – b, 73.40. – c, 72.90. + y |
| Keywords | Nanocontact (2) , Deoxyribonucleic Acid (DNA), Electronic transport, Current-Voltage characteristic (12) , Differential conductivity (3) , Transmission spectra (4) . |
| Annotation |
The coherent electronic transport of a nanosystem “Nb – DNA – Nb” was investigated, within the semi-empirical Hückel’s method. The calculation was implemented in the Atomistix ToolKit with Virtual NanoLab. The transmission spectrum, the current-voltage characteristic, and the differential conductivity of the nanosystem were calculated. It is shown that in the range of the bias voltage Vbias = – 0.8 ÷ 0.8 V, the fragment of the DNA molecule behaves like a dielectric and through it does not flow electric current, while a volt-ampere characteristic of the nanocontact forms a voltage discontinuity with a width of 1.6 V. In the field of contacting the nucleus of the nanosystem (DNA fragment) with niobium, quasi-particle transport is restricted through nanocontacts, similar to the Coulomb blockade, but this effect makes a minor contribution to the electric transport of the nanosystem. The obtained results can be useful for calculations of promising elements of organic nanoelectronics. |
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List of References English version of article |
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