| Issue |
EPL
Volume 150, Number 4, May 2025
|
|
|---|---|---|
| Article Number | 46003 | |
| Number of page(s) | 7 | |
| Section | Condensed matter and materials physics | |
| DOI | https://doi.org/10.1209/0295-5075/add803 | |
| Published online | 05 June 2025 | |
Contact separation in nanoswitches with regard to the Casimir force and exchange repulsion: Role of surface roughness and transmitted signal(a)
1 Central Astronomical Observatory at Pulkovo of the Russian Academy of Sciences - Saint Petersburg, 196140, Russia
2 Peter the Great Saint Petersburg Polytechnic University - Saint Petersburg, 195251, Russia
Received: 18 March 2025
Accepted: 13 May 2025
The dependence of the equilibrium contact separation for a nanoswitch operated by the van der Waals (Casimir), exchange repulsive, electric and elastic forces on the surface roughness and the parameters of a transmitted signal is investigated. The involved forces are calculated using the Lifshitz theory and the method of additive summation of the interatomic potentials for three different models of surface roughness. It is shown that the depth of the minimum in the sum of the van der Waals and exchange forces decreases with increasing roughness amplitudes. According to our results, in the presence of the transmitted signal the nanoswitch with the appropriately chosen operation voltage preserves its functionality with minor shifts in the equilibrium positions of contact separation.
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