Electric-field-induced avalanches and glassiness of mobile ferroelastic twin domains in cryogenic SrTiO3

Blai Casals*, Sebastiaan van Dijken, Gervasi Herranz, Ekhard K. H. Salje

*Corresponding author for this work

Research output: Contribution to journalArticleScientificpeer-review

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Abstract

Domain motion during ferroelectric switching has been recently suggested to follow scale-invariant avalanche dynamics. An interesting question concerns the dynamics of ferroelastic materials where the bulk material is nonpolar, while the polarity arises at domain walls only. We tackle this issue by investigating the dynamics of ferroelastic twins in SrTiO3 where the movement of domains is driven mainly by the anisotropic dielectric response at low temperatures. We find that the dynamics of the twin reconfiguration under electric field proceeds by jerks, where the energy distribution is power-law distributed, indicating avalanche dynamics. Avalanche exponents are sensitive to the complexity of the twin pattern structure, reflecting glassiness when twins are interwoven and forming junctions at the intersections between domain walls. This "glassy" behavior is attributed to the pinning originated by these self-generated defects during jamming between twins.

Original languageEnglish
Article number032025
Number of pages6
JournalPHYSICAL REVIEW RESEARCH
Volume1
Issue number3
DOIs
Publication statusPublished - 26 Nov 2019
MoE publication typeA1 Journal article-refereed

Keywords

  • CONSERVED ORDER PARAMETERS
  • PATTERN
  • KINETICS

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