The in situ Studies on the Anomalous Domain Switching Caused by Trace Amount of Oxygen Vacancies

1. Department of Condensed Matter Physics and Materials Science, Brookhaven National Laboratory, Upton, NY, USA. 2. School of Materials Science and Engineering, Tsinghua University, Beijing, P. R. China. 3. Department of Engineering Physics, Zhengzhou University, Zhengzhou, Henan, P. R. China. 4. Canadian Centre for Electron Microscopy and Department of Materials Science and Engineering, McMaster University, Hamilton, ON, Canada. * Corresponding author: zhu@bnl.gov