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LOCV calculation of the equations of state and properties of rapidly rotating neutron stars

Chinese Physics C 2018年第6期42卷 128-133页

作者： a.h.farajian M.Bigdeli S.Belbasi Department of Physics University of Zanjan

In this paper, we have investigated the structural properties of rotating neutron stars using the numerical RNS code and equations of state which have been calculated within the lowest order constrained variational（LOCV）approach. In order to calculate the equation of state of nuclear matter, we have used UV（14）＋TNI and AV（18） *** have computed the maximum mass of the neutron star and the corresponding equatorial radius at different angular velocities. We have also computed the structural properties of Keplerian rotating neutron stars for the maximum mass configuration, MK, RK, fK and jmax.

关键词： LOCV method neutron star matter equation of state rotating neutron star

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Silicene nanoribbons as carbon monoxide nanosensors with molecular resolution

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Nano Research 2014年第7期7卷 945-952页

作者： Tim h. Osborn Amir A. farajian Department of Mechanical and Materials Engineering Wright State University Dayton Ohio 45435 USA

Applications based on silicene as grown on substrates are of high interest toward actual utilization of this unique material. here we explore, from first principles, the nature of carbon monoxide adsorption on semiconducting silicene nanoribbons and the resulting quantum conduction modulation with and without silver contacts for sensing applications. We find that quantum conduction is detectably modified by weak chemisorption of a single CO molecule on a pristine silicene nanoribbon. This modification can be attributed to the charge transfer from CO to the silicene nanoribbon and the deformation induced by the CO chemisorption. Moderate binding energies provide an optimal mix of high detectability and recoverability. With Ag contacts attached to a -1 nm silicene nanoribbon, the interface states mask the conductance modulations caused by CO adsorption, emphasizing length effects for sensor applications. The effects of atmospheric gases--nitrogen, oxygen, carbon dioxide, and water--as well as CO adsorption density and edge-dangling bond defects, on sensor functionality are also investigated. Our results reveal pristine silicene nanoribbons as a promising new sensing material with single molecule resolution.

关键词： silicene silicon nanoribbon nanosensor carbon monoxide quantum transport contacts ab initio simulations

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