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Terahertz-Range Polar Modes in Domain-Engineered BiFeO_{3}.
- Source :
-
Physical review letters [Phys Rev Lett] 2017 Aug 04; Vol. 119 (5), pp. 057604. Date of Electronic Publication: 2017 Aug 04. - Publication Year :
- 2017
-
Abstract
- The dielectric permittivity and properties of electrically active lattice resonances in nanotwinned BiFeO_{3} crystals have been studied theoretically using an earlier established interatomic potential. The results suggest that an array of 71° domain walls with about 2-5 nm spacing enhances the static permittivity of BiFeO_{3} by more than an order of magnitude. This enhancement is associated with an electrically active excitation, corresponding to a collective vibration of pinned domain walls at a remarkably high frequency of about 0.3 THz.
Details
- Language :
- English
- ISSN :
- 1079-7114
- Volume :
- 119
- Issue :
- 5
- Database :
- MEDLINE
- Journal :
- Physical review letters
- Publication Type :
- Academic Journal
- Accession number :
- 28949744
- Full Text :
- https://doi.org/10.1103/PhysRevLett.119.057604