Warning! Note that elemental potentials taken from alloy descriptions may not work well for the pure species. This is particularly true if the elements were fit for compounds instead of being optimized separately. As with all interatomic potentials, please check to make sure that the performance is adequate for your problem.
Citation: R.S. Elliott, and A. Akerson (2015), "Efficient "universal" shifted Lennard-Jones model for all KIM API supported species".
Notes: This is the Ru interaction from the "Universal" parameterization for the openKIM LennardJones612 model driver.The parameterization uses a shifted cutoff so that all interactions have a continuous energy function at the cutoff radius. This model was automatically fit using Lorentz-Berthelotmixing rules. It reproduces the dimer equilibrium separation (covalent radii) and the bond dissociation energies. It has not been fitted to other physical properties and its ability to model structures other than dimers is unknown. See the README and params files on the KIM model page for more details.
Citation: A. Fortini, M.I. Mendelev, S. Buldyrev, and D. Srolovitz (2008), "Asperity contacts at the nanoscale: Comparison of Ru and Au", Journal of Applied Physics, 104(7), 074320. DOI: 10.1063/1.2991301.
Abstract: We develop and validate an interatomic potential for ruthenium based on the embedded atom method framework with the Finnis/Sinclair representation. We confirm that the potential yields a stable hcp lattice with reasonable lattice and elastic constants and surface and stacking fault energies. We employ molecular dynamics simulations to bring two surfaces together, one flat and the other with a single asperity. We compare the process of asperity contact formation and breaking in Au and Ru, two materials currently in use in microelectromechanical system switches. While Au is very ductile at 150 and 300 K, Ru shows considerably less plasticity at 300 and 600 K (approximately the same homologous temperature). In Au, the asperity necks down to a single atom thick bridge at separation. While similar necking occurs in Ru at 600 K, it is much more limited than in Au. On the other hand, at 300 K, Ru breaks by a much more brittle process of fracture/decohesion with limited plastic deformation.
See Computed Properties Notes: This file was provided by Mikhail Mendelev on May 15, 2008. The reference was updated on 14 October 2008. Update 19 July 2021: The contact email in the file's header has been changed. Update Jan 14 2022: Citation information has been updated in the file's header. File(s):
See Computed Properties Notes: Listing found at https://openkim.org. This KIM potential is based on the files from 2008--Fortini-A--Ru--LAMMPS--ipr1. Link(s):