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Ultrafast Photovoltaic Response in Ferroelectric Nanolayers

Daranciang, Dan; Highland, Matthew J.; Wen, Haidan; Young, Steve M.; Brandt, Nathaniel C.; Hwang, Harold Y.; Vattilana, Michael; Nicoul, Matthieu; Quirin, Florian and Goodfellow, John, et al. (2012) In Physical Review Letters 108(8).
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.
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publication status
published
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Physical Review Letters
volume
108
issue
8
publisher
American Physical Society
external identifiers
  • wos:000300669600033
  • scopus:84863181422
ISSN
1079-7114
DOI
10.1103/PhysRevLett.108.087601
language
English
LU publication?
yes
id
64a5c16d-9087-4853-8945-3596dae4fb66 (old id 2384293)
date added to LUP
2012-03-30 14:40:15
date last changed
2017-10-01 03:08:59
@article{64a5c16d-9087-4853-8945-3596dae4fb66,
  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.},
  articleno    = {087601},
  author       = {Daranciang, Dan and Highland, Matthew J. and Wen, Haidan and Young, Steve M. and Brandt, Nathaniel C. and Hwang, Harold Y. and Vattilana, Michael and Nicoul, Matthieu and Quirin, Florian and Goodfellow, John and Qi, Tingting and Grinberg, Ilya and Fritz, David M. and Cammarata, Marco and Zhu, Diling and Lemke, Henrik T. and Walko, Donald A. and Dufresne, Eric M. and Li, Yuelin and Larsson, Jörgen and Reis, David A. and Sokolowski-Tinten, Klaus and Nelson, Keith A. and Rappe, Andrew M. and Fuoss, Paul H. and Stephenson, G. Brian and Lindenberg, Aaron M.},
  issn         = {1079-7114},
  language     = {eng},
  number       = {8},
  publisher    = {American Physical Society},
  series       = {Physical Review Letters},
  title        = {Ultrafast Photovoltaic Response in Ferroelectric Nanolayers},
  url          = {http://dx.doi.org/10.1103/PhysRevLett.108.087601},
  volume       = {108},
  year         = {2012},
}