Tunnel volt-ampere characteristics for colloidal gold quantum dots under dissipative tunneling conditions

17th Russian Youth Conference on Physics of Semiconductors and Nanostructures, Opto- and Nanoelectronics

Krevchik, V.D.^1 ; Semenov, M.B.^1 ; Filatov, D.O.^2 ; Zaytsev, R.V.^1 ; Krevchik, P.V.^1 ; Budyansky, P.S.^1 ; Egorov, I.A.^1 ; Moyko, I.M.^1 ; Skorosova, I.K.^1 ; Sultanov, M.A.^1 ; Semenov, I.M.^1

Faculty of Engineering, IT and Electronics, Department of Physics, Penza State University, 40 Krasnaya str., Penza

440026, Russia^1

Faculty of Physics, N i Lobachevsky State University of Nizhny Novgorod, 43 Gagarina Ave., Nizhny Novgorod

603950, Russia^2

关键词: Colloidal gold;    Experimental curves;    Phonon mode;    Probability curves;    Tunnel currents;    Volt-ampere characteristics;    Wide-band;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/690/1/012029/pdf
DOI  :  10.1088/1742-6596/690/1/012029

来源: IOP

【 摘 要 】

In this project the tunnel volt-ampere characteristics of colloidal gold quantum dots in a system of combined tunnel and atomic force microscopes were experimentally measured. It is assumed that ionic conductivity contributes for tunnel current the most. A qualitative comparison was made for tunnel volt-ampere characteristics and the theoretical probability curve of 2D-dissipative tunneling under influence of two local wide-band phonon modes. A qualitative agreement was found for theoretical and experimental curves, which indicates the possible contribution of the dissipative tunneling in the current through a quantum dot at the tip of a cantilever, which can be amplified in clusters ranging in size from 1 to 5 nm in thinner films.