TY  - JOUR
AU  - Jiang, Zhijun
AU  - Xu, Bin
AU  - Li, Fei
AU  - Wang, Dawei
AU  - Jia, C.-L.
TI  - Electric dipole sheets in ${\mathrm{BaTiO}}_{3}/{\mathrm{BaZrO}}_{3}$ superlattices
JO  - Physical review / B
VL  - 91
IS  - 1
SN  - 1098-0121
CY  - College Park, Md.
PB  - APS
M1  - FZJ-2015-01617
SP  - 014105
PY  - 2015
AB  - We investigate two-dimensional electric dipole sheets in the superlattice made of BaTiO3 and BaZrO3 using first-principles-based Monte Carlo simulations and density functional calculations. Electric dipole domains and complex patterns are observed and complex dipole structures with various symmetries (e.g., Pma2,Cmcm, and Pmc21) are further confirmed by density functional calculations, which are found to be almost degenerate in energy with the ferroelectric ground state of the Amm2 symmetry, therefore strongly resembling magnetic sheets. More complex dipole patterns, including vortices and antivortices, are also observed, which may constitute the intermediate states that overcome the high-energy barrier of different polarization orientations previously predicted by A. I. Lebedev [Phys. Solid State 55, 1198 (2013)]. We also show that such system possesses large electrostrictive effects that may be technologically important.
LB  - PUB:(DE-HGF)16
UR  - <Go to ISI:>//WOS:000348153700001
DO  - DOI:10.1103/PhysRevB.91.014105
UR  - https://juser.fz-juelich.de/record/188156
ER  -