Ultrafast Photovoltaic Response in Ferroelectric Nanolayers

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Bibtex

@article{64a5c16d9087485389453596dae4fb66,
title = "Ultrafast Photovoltaic Response in Ferroelectric Nanolayers",
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.",
author = "Dan Daranciang and Highland, {Matthew J.} and Haidan Wen and Young, {Steve M.} and Brandt, {Nathaniel C.} and Hwang, {Harold Y.} and Michael Vattilana and Matthieu Nicoul and Florian Quirin and John Goodfellow and Tingting Qi and Ilya Grinberg and Fritz, {David M.} and Marco Cammarata and Diling Zhu and Lemke, {Henrik T.} and Walko, {Donald A.} and Dufresne, {Eric M.} and Yuelin Li and J{\"o}rgen Larsson and Reis, {David A.} and Klaus Sokolowski-Tinten and Nelson, {Keith A.} and Rappe, {Andrew M.} and Fuoss, {Paul H.} and Stephenson, {G. Brian} and Lindenberg, {Aaron M.}",
year = "2012",
doi = "10.1103/PhysRevLett.108.087601",
language = "English",
volume = "108",
journal = "Physical Review Letters",
issn = "1079-7114",
publisher = "American Physical Society",
number = "8",

}