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Ultrafast Photovoltaic Response in Ferroelectric Nanolayers
- Source :
- Daranciang, D, Highland, M J, Wen, H, Young, S M, Brandt, N C, Hwang, H Y, Vattilana, M, Quirin, F, Goodfellow, J, Qi, T, Grinberg, I & Lemke, H T 2012, ' Ultrafast Photovoltaic Response in Ferroelectric Nanolayers ', Physical Review Letters, vol. 108, no. 8, 087601 . https://doi.org/10.1103/PhysRevLett.108.087601, Physical Review Letters; 108(8), no 087601 (2012)
- Publication Year :
- 2012
-
Abstract
- We show that light drives large-amplitude structural changes in thin films of the prototypical ferroelectric PbTiO3 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.
Details
- Language :
- English
- ISSN :
- 10797114
- Database :
- OpenAIRE
- Journal :
- Daranciang, D, Highland, M J, Wen, H, Young, S M, Brandt, N C, Hwang, H Y, Vattilana, M, Quirin, F, Goodfellow, J, Qi, T, Grinberg, I & Lemke, H T 2012, ' Ultrafast Photovoltaic Response in Ferroelectric Nanolayers ', Physical Review Letters, vol. 108, no. 8, 087601 . https://doi.org/10.1103/PhysRevLett.108.087601, Physical Review Letters; 108(8), no 087601 (2012)
- Accession number :
- edsair.doi.dedup.....66729f591b6a0f6c32744c75627df04e