In-situ real-space imaging of single crystal surface reconstructions via electron microscopy
Abstract
Here, we report a high temperature in-situ atomic resolution scanning transmission electron microscopy (STEM) study of single crystal surface structure dynamics. With the approach, we gain direct insight into a double layer reconstruction that occurs on the polar SrTiO3 (110) surface. We find that structural details of this reconstruction can be directly attributed to charge redistribution and the thermal mismatch between the surface and the bulk material. Periodic surface defects, similar to dislocations, are found, which act to relieve stress as the temperature is lowered. Combining STEM observations, electron energy loss spectroscopy, and density functional theory, we highlight the combined role of lattice misfit and charge compensation to determine the structure and chemistry of the observed polar surface reconstruction.
Document Details
- Document Type
- Pub Defense Publication
- Publication Date
- Nov 14, 2016
- Source ID
- 10.1063/1.4967978
Entities
People
- Douglas L Irving
- Everett D. Grimley
- James M. LeBeau
- Preston C Bowes
- Weizong Xu
Organizations
- Air Force Office of Scientific Research
- National Science Foundation
- North Carolina State University