Photoelasticity of alpha-quartz from first principles - art. no. 115118

Citation
F. Detraux et X. Gonze, Photoelasticity of alpha-quartz from first principles - art. no. 115118, PHYS REV B, 6311(11), 2001, pp. 5118
Citations number
39
Categorie Soggetti
Apllied Physucs/Condensed Matter/Materiales Science
Journal title
PHYSICAL REVIEW B
ISSN journal
01631829 → ACNP
Volume
6311
Issue
11
Year of publication
2001
Database
ISI
SICI code
0163-1829(20010315)6311:11<5118:POAFFP>2.0.ZU;2-O
Abstract
Using density-functional perturbation theory with a scissor correction, we compute the entire photoelastic tensor of alpha -quartz. Its components, wh ose absolute values range between 0.047 and 0.29 are all described within 0 .04. We also compute the Born effective charge tensor and present its varia tion with respect to strain, as well as the relative deformation potentials and the structural rearrangement caused by strain. Then, we discuss briefl y the mechanisms involved in the photoelasticity of quartz.