Non-linear electro-elastic coupling in non-centrosymmetric materials

Jacky Even (1) , Laurent Pedesseau (1) , Chahira Hajlaoui (1) , Claudine Katan (2) , Jean-Marc Jancu (1)

1 FOTON - Fonctions Optiques pour les Technologies de l'informatiON
2 ISCR - Institut des Sciences Chimiques de Rennes

We propose an extended symmetry-based thermodynamical model of third-order electro-elastic coupling. The entanglement of electrostriction non-linear piezoelectricity and other non-linear phenomena, is studied in details at the same level of theory. Symmetry properties of materials and nanostructures are taken into account. Density Functional Theory (DFT) is used to calculate the complete set of linear and non-linear coefficients. Electrostriction dominates for nitride compounds in the Würtzite structure, but non-linear elasticity and piezoelectricity must be taken into account for strain and electric field evaluation.

Domaines: Optique / photonique; Optique [physics.optics]

Jacky Even, Laurent Pedesseau, Chahira Hajlaoui, Claudine Katan, Jean-Marc Jancu. Non-linear electro-elastic coupling in non-centrosymmetric materials. 3rd Workshop on Theory, Modelling and Computational Methods for Semiconductors (TMCSIII), Jan 2012, Leeds, United Kingdom. pp.012005, ⟨10.1088/1742-6596/367/1/012005⟩. ⟨hal-00725707⟩