Abstract
Through mapping of the spatiotemporal strain profile in ferroelectric BiFeO3epitaxial thin films, we report an optically initiated dynamic enhancement of the strain gradient of 105-106 m-1 that lasts up to a few ns depending on the film thickness. Correlating with transient optical absorption measurements, the enhancement of the strain gradient is attributed to a piezoelectric effect driven by a transient screening field mediated by excitons. These findings not only demonstrate a new possible way of controlling the flexoelectric effect, but also reveal the important role of exciton dynamics in photostriction and photovoltaic effects in ferroelectrics.
| Original language | English |
|---|---|
| Article number | 16650 |
| Journal | Scientific Reports |
| Volume | 5 |
| DOIs | |
| Publication status | Published - Nov 20 2015 |
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ASJC Scopus subject areas
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Cite this
Giant optical enhancement of strain gradient in ferroelectric BiFeO3 thin films and its physical origin. / Li, Yuelin; Adamo, Carolina; Chen, Pice; Evans, Paul G.; Nakhmanson, Serge M.; Parker, William; Rowland, Clare E.; Schaller, Richard D; Schlom, Darrell G.; Walko, Donald A.; Wen, Haidan; Zhang, Qingteng.
In: Scientific Reports, Vol. 5, 16650, 20.11.2015.Research output: Contribution to journal › Article
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TY - JOUR
T1 - Giant optical enhancement of strain gradient in ferroelectric BiFeO3 thin films and its physical origin
AU - Li, Yuelin
AU - Adamo, Carolina
AU - Chen, Pice
AU - Evans, Paul G.
AU - Nakhmanson, Serge M.
AU - Parker, William
AU - Rowland, Clare E.
AU - Schaller, Richard D
AU - Schlom, Darrell G.
AU - Walko, Donald A.
AU - Wen, Haidan
AU - Zhang, Qingteng
PY - 2015/11/20
Y1 - 2015/11/20
N2 - Through mapping of the spatiotemporal strain profile in ferroelectric BiFeO3epitaxial thin films, we report an optically initiated dynamic enhancement of the strain gradient of 105-106 m-1 that lasts up to a few ns depending on the film thickness. Correlating with transient optical absorption measurements, the enhancement of the strain gradient is attributed to a piezoelectric effect driven by a transient screening field mediated by excitons. These findings not only demonstrate a new possible way of controlling the flexoelectric effect, but also reveal the important role of exciton dynamics in photostriction and photovoltaic effects in ferroelectrics.
AB - Through mapping of the spatiotemporal strain profile in ferroelectric BiFeO3epitaxial thin films, we report an optically initiated dynamic enhancement of the strain gradient of 105-106 m-1 that lasts up to a few ns depending on the film thickness. Correlating with transient optical absorption measurements, the enhancement of the strain gradient is attributed to a piezoelectric effect driven by a transient screening field mediated by excitons. These findings not only demonstrate a new possible way of controlling the flexoelectric effect, but also reveal the important role of exciton dynamics in photostriction and photovoltaic effects in ferroelectrics.
UR - http://www.scopus.com/inward/record.url?scp=84947750529&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=84947750529&partnerID=8YFLogxK
U2 - 10.1038/srep16650
DO - 10.1038/srep16650
M3 - Article
VL - 5
JO - Scientific Reports
JF - Scientific Reports
SN - 2045-2322
M1 - 16650
ER -