An alternative to the currently existing elemental basis for creating dynamic random-access memory and flash memory is memristor structures, i.e., two-electrode systems, whose operation is based on the resistance switching effect. In this paper, the results of studying the specific features of the production of memristor structures on the basis of copper sulfide as a promising material providing high-efficiency performance of the structures are reported. The process of copper sulfurization is considered. In this process, the surface region of the copper layer is transformed into sulfide, and the remaining part of the layer is used as the active electrode for the later formed memristor structure. It is shown that, as the concentrations of the initial chemical reagents is increased, the surface roughness of the sulfide layer significantly increases. The sulfide growth rate at optimal initial concentrations of the chemical reagents is ~30 nm/min. In studies of memristor structures, it is established that, as the copper sulfide thickness is increased, the ratio between the resistances in the low- and high-resistance states increases from 11.2 to 12.5. In the memristor structures formed in the study, the time of switching from the high- to low-resistance state is about 1.3 μs, whereas the time of switching from the low- to high-resistance state is 0.9 μs.
This is a preview of subscription content, log in to check access.
Buy single article
Instant access to the full article PDF.
Price includes VAT for USA
A. Chen, J. Hutchby, V. Zhirnov, and G. Bourianoff, Emerging Nanoelectronic Devices (Wiley, Hoboken, 2015).
L. O. Chua, Appl. Phys. Lett. 102, 765 (2011).
R. Waser, F. Alibart, L. Gao, et al., Nanotechnology 23, 075201 (2012).
A. N. Belov, A. A. Perevalov, and V. I. Shevyakov, Izv. Vyssh. Uchebn. Zaved., Elektron. 22, 305 (2017).
S. Dietrich, M. Angerbauer, M. Ivanov, et al., IEEE J. Solid-State Circuits 42, 839 (2007).
C. O’Kelly, J. A. Fairfield, and J. J. Boland, ACS Nano, No. 8, 11724 (2014).
M. N. Kozicki, M. Park, and M. Mitkova, IEEE Trans. Nanotechnol. 4, 331 (2005).
I. Valov, R. Waser, J. R. Jameson, and M. N. Kozicki, Nanotechnology 22, 254003 (2011).
I. Valov and G. Staikov, J. Solid State Electrochem. 17, 365 (2013).
M. Leon and F. Arjona, J. Phys. D: Appl. Phys. 19, 1529 (1986).
N. Schneider, D. Lincot, and F. Donsanti, Thin Solid Films 600, 103 (2016).
The study was supported by the Russian Science Foundation, project no. 15-19-00138.
Translated by E. Smorgonskaya
About this article
Cite this article
Belov, A.N., Golishnikov, A.A., Mastinin, A.M. et al. Study of the Formation Process of Memristor Structures Based on Copper Sulfide. Semiconductors 53, 2024–2028 (2019). https://doi.org/10.1134/S1063782619150041
- memristor structures
- two-electrode system
- solid electrolyte
- scanning electron microscopy