Abstract
We show that light drives large-amplitude structural changes in thin films of the prototypical ferroelectric PbTiO 3 via direct coupling to its intrinsic photovoltaic response. Using time-resolved x-ray scattering to visualize atomic displacements on femtosecond time scales, photoinduced changes in the unit-cell tetragonality are observed. These are driven by the motion of photogenerated free charges within the ferroelectric and can be simply explained by a model including both shift and screening currents, associated with the displacement of electrons first antiparallel to and then parallel to the ferroelectric polarization direction.
| Original language | English (US) |
|---|---|
| Article number | 087601 |
| Journal | Physical review letters |
| Volume | 108 |
| Issue number | 8 |
| DOIs | |
| State | Published - Feb 23 2012 |
| Externally published | Yes |
UN SDGs
This output contributes to the following UN Sustainable Development Goals (SDGs)
-
SDG 7 Affordable and Clean Energy
Fingerprint
Dive into the research topics of 'Ultrafast photovoltaic response in ferroelectric nanolayers'. Together they form a unique fingerprint.Cite this
- APA
- Standard
- Harvard
- Vancouver
- Author
- BIBTEX
- RIS