2012-2019, BA Electronic Science & MA Materials Science, Uni of Electronic Science and Technology of China
Thesis: Dynamic Scaling Behaviour of Ferroelectric Domain Wall studied by Piezoresponse Force Microscopy
2019-, PhD student, University of Warwick
Supervisor: Prof. Ana Sanchez
EPSRC funded project: In-situ manipulation of ferroelectric structures at atomic level
My research focuses on ferroelectric materials which are a family of materials that exhibit a finite spontaneous polarization in absence of an enternal field below their Curie temperature. We can locate positions of their componential atoms and calculate their displacements by the help of atomic resolution Scanning Transmission Electron Microscopy(STEM). Spontaneous polarization of different materials can then be estimated and compared with existing values for a detailed study of ferroelectricity origin. Furthermore, we are trying to carry out in-situ polarization analysis under electrical bias and/or heating to see how ferroelectric structures would behave under controllabel electrical/temperature conditions.
STEM-ADF image of epitaxial BiFeO3 thin film(bright) grown on vicinal SrTiO3 substrate(dark), with beam direction parallerl to pc. A dislocation line can be found in the middle of the interface, resulting the BiFeO3 cells at left/right side to have opposite inclination.
- EMAG 2021 (Oral) - "Polarization Mapping in Single Crystal BiFeO3 by Atomic Resolution STEM".
- 2019-2020: Demonstrator for the 2nd year Physics undergraduate laboratory.
Department of Physics
University of Warwick
Office: MAS 1.06