title: Pattern selection in biaxially stressed solids.
abstract: We analyze the morphological instability of the surface of a solid which is subject to a biaxial stress. The stability calculation reveals a new favored pattern: a diamond morphology. This occurs if the stress is tensile in one direction and compressive in the orthogonal one and the ratio exceeds a certain value. A nonlinear analysis shows that the bifurcation is subcritical and hints to a nontrivial competition between tilted stripes and diamonds. This study opens a new line of inquiries in the field of stress-induced pattern selection.
authors.affiliation: Laboratoire de Spectrométrie Physique GREPHE, Université Joseph Fourier (CNRS), Grenoble I, BP 87, 38402 Saint Martin d'Hères, France.
authors.forename: Patrick
authors.initials: P
authors.lastname: Berger
authors.forename: Peter
authors.initials: P
authors.lastname: Kohlert
authors.forename: Klaus
authors.initials: K
authors.lastname: Kassner
authors.forename: Chaouqi
authors.initials: C
authors.lastname: Misbah