Many-body forces in solids and the Brugger elastic constants. II. Inner elastic constants

摘要: For pt.I see ibid., vol.8, no.18, p.2837 (1975). The method of homogeneous deformations is used to derive expressions for the first- and second-order inner elastic constants a crystalline solid in which energy density composed contributions from many-body interaction terms various order. These results are obtained by straightforward extension techniques part I. Lagrangian definition strain describe macroscopic lattice, rotationally invariant measure displacement internal strain. This ensures that have symmetry properties commonly associated with rotational invariance, at both zero finite