Surface eigen-displacement and surface Poisson’s ratios of solids

✍ Scribed by Tong-Yi Zhang; Hang Ren; Zhi-Jia Wang; Sheng Sun

• Publisher: Elsevier Science
• Year: 2011
• Tongue: English
• Weight: 814 KB
• Volume: 59
• Category: Article
• ISSN: 1359-6454
• DOI: 10.1016/j.actamat.2011.03.067

✦ Synopsis

Theoretical analysis and molecular dynamics simulations were conducted to study systematically surface eigen-displacement and surface Poisson's ratios of solids, which play essential roles in surface energy, surface strain and surface stress. Face-centered cubic (0 0 1) Au thin films were taken as typical examples to illustrate the physical picture. The surface eigen-displacement is a critical surface strain at the equilibrium state after normal relaxation and thus an intrinsic surface property. Surface Poisson's ratios are also intrinsic surface properties. Combining surface eigen-displacement and surface Poisson's ratios with surface eigen-stress and surface tangential elastic constants lays foundations of surface elasticity of solids.