Investigating the temperature dependence of elastic constants by thermal fluctuation formula

Local-strain mapping on Ag(111) islands on Nb(110)

“…7 For comparison of our results with linear elasticity theory, we have conducted FEM simulations and calculated the von-Mises stresses by means of the Comsol Multiphysics package V4.2 a with elasticity tensor c and thermalexpansion coefficients aðTÞ for Nb(110) on Ag(111). [24][25][26] We have used bulk values because there is no evidence that the thermal-expansion coefficient and bulk modulus of a film differ from the bulk values. 2 Figure 5(b) shows a FEM calculation for an island with a shape adapted to the measured island, cf.…”