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Strain-gradient mediated local conduction in strained bismuth ferrite films

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Yang, Ming-Min, Iqbal, Affan, Peters, Jonathan J. P., Sánchez, Ana M. and Alexe, M. (Marin) (2019) Strain-gradient mediated local conduction in strained bismuth ferrite films. Nature Communications, 10 (1). 2791. doi:10.1038/s41467-019-10664-5 ISSN 2041-1723.

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Official URL: https://doi.org/10.1038/s41467-019-10664-5

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Abstract

It has been recently shown that the strain gradient is able to separate the light-excited electron-hole pairs in semiconductors, but how it affects the photoelectric properties of the photo-active materials remains an open question. Here, we demonstrate the critical role of the strain gradient in mediating local photoelectric properties in the strained BiFeO3 thin films by systematically characterizing the local conduction with nanometre lateral resolution in both dark and illuminated conditions. Due to the giant strain gradient manifested at the morphotropic phase boundaries, the associated flexo-photovoltaic effect induces on one side an enhanced photoconduction in the R-phase, and on the other side a negative photoconductivity in the morphotropic T′-phase. This work offers insight and implication of the strain gradient on the electronic properties in both optoelectronic and photovoltaic devices.

Item Type: Journal Article
Subjects: Q Science > QC Physics
T Technology > TK Electrical engineering. Electronics Nuclear engineering
Divisions: Faculty of Science, Engineering and Medicine > Science > Physics
SWORD Depositor: Library Publications Router
Library of Congress Subject Headings (LCSH): Semiconductors, Photoelectric cells, Photovoltaic effect
Journal or Publication Title: Nature Communications
Publisher: Nature Publishing Group
ISSN: 2041-1723
Official Date: 26 June 2019
Dates:
DateEvent
26 June 2019Published
15 May 2019Accepted
Volume: 10
Number: 1
Article Number: 2791
DOI: 10.1038/s41467-019-10664-5
Status: Peer Reviewed
Publication Status: Published
Access rights to Published version: Open Access (Creative Commons)
Date of first compliant deposit: 16 March 2020
Date of first compliant Open Access: 16 March 2020
RIOXX Funder/Project Grant:
Project/Grant IDRIOXX Funder NameFunder ID
EP/M022706/1[EPSRC] Engineering and Physical Sciences Research Councilhttp://dx.doi.org/10.13039/501100000266
EP/P031544/1[EPSRC] Engineering and Physical Sciences Research Councilhttp://dx.doi.org/10.13039/501100000266
EP/P025803/1[EPSRC] Engineering and Physical Sciences Research Councilhttp://dx.doi.org/10.13039/501100000266
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