PSI - Issue 23

Sergiy Kotrechko et al. / Procedia Structural Integrity 23 (2019) 310–315 Author name / Structural Integrity Procedia 00 (2019) 000 – 000

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force, f F , and the value of the lower limit of IZ, R F , it is possible to realise two fluctuation-induced mechanisms of failure: high-energy at f R F F  , and low-energy at f R F F  . In general, a dependence of the IZ width on both the number of atoms in the carbyne chain and the magnitude of applied mechanical load, requires further investigations. 3. The quantum-mechanical nature of the lifetime of carbyne – graphene nanoelements is manifested in the existence of an “even - odd” effect. This is due to dependence of the contact bond energy and the magnitude of the critical force of its instability on whether the number of atoms in a carbyne chain is even or odd. The specific feature of the “even - odd” effect for the lifetime of carbyne– graphene nanoelements is the inversion of this effect when applied a force field. This inversion is a consequence of the change in the mechanism of fluctuation-induced break of the contact bond. These two effects are interesting from a physical point of view, and may have application in straintronics elements. Acknowledgements This work was supported by the National Academy of Sciences of Ukraine (grant s’ numbers #0117U002131 and #0117U006351). Cahangirov S, Topsakal M, and Ciraci S. 2010. Long-range interactions in carbon atomic chains. Physical Review B 82, 195444 Kotrechko S., Timoshevskii A., Kolyvoshko E., Matviychuk Yu., Stetsenko N. 2017. Thermomechanical stability of carbyne-based nanodevices. Nanoscale Research Letters 12, 327-334. Kotrechko S., Timoshevskii A., Kolyvoshko E., Matviychuk Yu., Stetsenko N. and Baode Zhang. 2019. Lifetime of carbyne-based nanodevices: size and “even - odd” effects . The European Physical Journal Plus 134, 182-191. Lin ZZ, Yu WF, Wang Y, and Ning XJ. 2011. Predicting the stability of nanodevices. Europhysics Letters 94, 40002(1 – 5). Marinica MC, Barreteau C, Spanjaard D, and Desjonqueres MC. 2005. Diffusion rates of Cu adatoms on Cu(111) in the presence of an adisland nucleated at fcc or hcp sites. Physical Review B 72, 115402. Slutsker A.I. 2004. Characteristics of elementary acts in the kinetics of metal fracture. Physics of the Solid State 46 (9), 1658 – 1666. Smith IWM. 2008. The temperature-dependence of elementary reaction rates: beyond Arrhenius. Chemical Society Review 37, 812-826. Timoshevskii A, Kotrechko S, and Matviychuk Yu. 2015. Atomic structure and mechanical properties of carbyne. Physical Review B 91, 245434 . References