Strain-gradient mediated local conduction in strained bismuth ferrite films.

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ID: 19318
2019
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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 BiFeO 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 [Formula: see text]-phase. This work offers insight and implication of the strain gradient on the electronic properties in both optoelectronic and photovoltaic devices.
Reference Key
yang2019straingradientnature Use this key to autocite in the manuscript while using SciMatic Manuscript Manager or Thesis Manager
Authors Yang, Ming-Min;Iqbal, Affan N;Peters, Jonathan J P;Sanchez, Ana M;Alexe, Marin;
Journal Nature communications
Year 2019
DOI
10.1038/s41467-019-10664-5
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Keywords Keywords not found

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