Pressure-Induced Sublattice Disordering in SnO 2 : Invasive Selective Percolation - Laboratoire Charles Coulomb (L2C) Accéder directement au contenu
Article Dans Une Revue Physical Review Letters Année : 2018

Pressure-Induced Sublattice Disordering in SnO 2 : Invasive Selective Percolation

Résumé

SnO2 powders and single crystal have been studied under high pressure using Raman spectroscopy and ab initio simulations. The pressure-induced changes are shown to drastically depend on the form of the samples. The single crystal exhibits phase transitions as reported in the literature, whereas powder samples show a disordering of the oxygen sublattice in the first steps of compression. This behavior is proposed to be related to the defect density, an interpretation supported by ab initio simulations. The link between the defect density and an amorphouslike Raman signal is discussed in terms of the invasive percolation of the anionic sublattice. The resistance of the cationic sublattice to the disorder propagation is discussed in terms of cation close packing. This result on SnO2 may be extended to other systems and questions a “traditional” crystallographic description based on polyhedra packing, as a decoupling between both sublattices is observed.
Fichier principal
Vignette du fichier
PhysRevLett.120.265702-Meuartigo2.pdf (464.61 Ko) Télécharger le fichier
Origine : Fichiers éditeurs autorisés sur une archive ouverte

Dates et versions

hal-02342393 , version 1 (11-02-2021)

Identifiants

Citer

Helainne Girao, Patrick Hermet, Bruno Masenelli, Julien Haines, Patrice Mélinon, et al.. Pressure-Induced Sublattice Disordering in SnO 2 : Invasive Selective Percolation. Physical Review Letters, 2018, 120 (26), pp.265702. ⟨10.1103/PhysRevLett.120.265702⟩. ⟨hal-02342393⟩
169 Consultations
128 Téléchargements

Altmetric

Partager

Gmail Facebook X LinkedIn More