title: Mechanical properties of carbyne: experiment and simulations.
abstract: The results of the high-field technique for obtaining and testing the carbyne strength in situ are presented. By using molecular dynamics simulation and ab initio calculations, a comprehensive analysis of the results is executed. High-field technique for experimental measurement of the carbyne strength in situ is briefly described. It is shown that the technique used gives a lower estimation for strength of carbyne, which equals 251 GPa at T = 77 K. This value is close to the strength 7.85 nN (250 GPa) of contact atomic bond between carbyne and graphene sheet, from which the monatomic chain is pulled. The strength of carbyne itself is determined by strength of an edge atomic bond and it is ≈ 12.35 nN (393 GPa) at T = 0 K. For carbynes containing more than 10 to 12 atoms, the coefficient of elasticity (k Y  = 145.40 nN) and the elastic modulus (Y = 4631 GPa) are ascertain.
authors: G. V. Kurdyumov Institute for Metal Physics, National Academy of Science of Ukraine, Vernadsky Boulevard, 36, Kyiv, 03680 Ukraine.
authors: Sergiy
authors: S
authors: Kotrechko
authors: National Scientific Center, Kharkov Institute for Physics and Technology, National Academy of Science of Ukraine, Academicheskaja, 1, Kharkov, 61108 Ukraine.
authors: Igor
authors: I
authors: Mikhailovskij
authors: National Scientific Center, Kharkov Institute for Physics and Technology, National Academy of Science of Ukraine, Academicheskaja, 1, Kharkov, 61108 Ukraine.
authors: Tatjana
authors: T
authors: Mazilova
authors: National Scientific Center, Kharkov Institute for Physics and Technology, National Academy of Science of Ukraine, Academicheskaja, 1, Kharkov, 61108 Ukraine.
authors: Evgenij
authors: E
authors: Sadanov
authors: G. V. Kurdyumov Institute for Metal Physics, National Academy of Science of Ukraine, Vernadsky Boulevard, 36, Kyiv, 03680 Ukraine.
authors: Andrei
authors: A
authors: Timoshevskii
authors: G. V. Kurdyumov Institute for Metal Physics, National Academy of Science of Ukraine, Vernadsky Boulevard, 36, Kyiv, 03680 Ukraine.
authors: Nataliya
authors: N
authors: Stetsenko
authors: G. V. Kurdyumov Institute for Metal Physics, National Academy of Science of Ukraine, Vernadsky Boulevard, 36, Kyiv, 03680 Ukraine.
authors: Yurij
authors: Y
authors: Matviychuk
keywords: Ab initio simulation; Carbon monatomic chains; Carbyne; Field emission microscope; High-field method; Strength