Abstract
Recent advances in scanning transmission electron microscopy (STEM) have enabled direct visualization of the atomic structure of ferroic materials, enabling the determination of atomic column positions with approximately picometer precision. This, in turn, enabled direct mapping of ferroelectric and ferroelastic order parameter fields via the top-down approach, where the atomic coordinates are directly mapped on the mesoscopic order parameters. Here, we explore the alternative bottom-up approach, where the atomic coordinates derived from the STEM image are used to explore the extant atomic displacement patterns in the material and build the collection of the building blocks for the distorted lattice. This approach is illustrated for the La-doped BiFeO3 system.
| Original language | English |
|---|---|
| Article number | 052902 |
| Journal | Applied Physics Letters |
| Volume | 115 |
| Issue number | 5 |
| DOIs | |
| State | Published - Jul 29 2019 |
Funding
The concept of the Jupyter based publications is proposed and developed by M.Z., R.K.V., and S.V.K. This research was supported by the U.S. Department of Energy, Office of Science, Basic Energy Sciences, Materials Sciences and Engineering Division (S.V.K., R.K.V., C.N.). This research was conducted at the Center for Nanophase Materials Sciences and is a DOE Office of Science User Facility. Electron microscopy at the Molecular Foundry, Lawrence Berkeley National Laboratory, was supported by the U.S. Department of Energy, Office of Science, Office of Basic Energy Sciences under Contract No. DE-AC02-05CD11231.