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Electric-field-induced avalanches and glassiness of mobile ferroelastic twin domains in cryogenic SrTiO3
- Source :
- Digital.CSIC. Repositorio Institucional del CSIC, instname
- Publication Year :
- 2019
- Publisher :
- American Physical Society, 2019.
-
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 SrTi O 3 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.<br />We acknowledge financial support from EPSRC (Grant No. EP/P024904/1) and support from the Spanish Ministerio de Ciencia, Innovación y Universidades through Grant No. MAT2017-85232-R (AEI/FEDER, EU), Severo Ochoa SEV-2015-0496, the Generalitat de Catalunya through Grant No. 2017 301 SGR1377, and the Academy of Finland (Grant No. 316857).
- Subjects :
- Physics
CONSERVED ORDER PARAMETERS
Ferroelasticity
Condensed matter physics
02 engineering and technology
021001 nanoscience & nanotechnology
01 natural sciences
Condensed Matter::Materials Science
PATTERN
Flexoelectrics
Electric field
Condensed Matter::Superconductivity
0103 physical sciences
Domains
Nucleation
Jamming
010306 general physics
0210 nano-technology
KINETICS
Subjects
Details
- Language :
- English
- Database :
- OpenAIRE
- Journal :
- Digital.CSIC. Repositorio Institucional del CSIC, instname
- Accession number :
- edsair.doi.dedup.....c27c862cd96f9410b009d4ad9b7d5afb