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Title: Large electroresistance and tunable photovoltaic properties of ferroelectric nanoscale capacitors based on ultrathin super-tetragonal BiFeO3 films
Authors: Fan, H
Fan, Z
Li, PL
Zhang, FY
Tian, G
Yao, JX
Li, ZW
Song, X
Chen, DY
Han, B
Zeng, M
Wu, SJ
Zhang, Z
Qin, MH
Lu, XB
Gao, JW
Lu, ZX
Zhang, Z 
Dai, JY 
Gao, XSLiu, JM
Issue Date: 2017
Publisher: Royal Society of Chemistry
Source: Journal of materials chemistry C, 2017, v. 5, no. 13, p. 3323-3329 How to cite?
Journal: Journal of materials chemistry C 
Abstract: Ferroelectric nanocapacitors with simultaneously tunable resistance and photovoltaic effect have great potential for realizing high-density non-volatile memories and multifunctional opto-electronic nanodevices. Here, using a polystyrene sphere template method, we developed well-ordered Au nanoelectrode arrays on super-tetragonal BiFeO3 (T-BFO)/La0.7Sr0.3MnO3 (LSMO) epitaxial thin films, forming Au/T-BFO/LSMO nanocapacitors. The nanocapacitors exhibited switchable resistance states and photovoltaic responses, controllable by the ferroelectric polarization of T-BFO. Owing to the giant polarization of T-BFO, both giant electroresistance (ON/OFF current ratio >20 000) and noticeable photovoltage (similar to 0.4 V) were achieved in the Au/T-BFO/LSMO nanocapacitors. These results demonstrate that the T-BFO-based nanocapacitors are promising for applications in high-density memories with multiple routes for non-destructive readout, as well as other multifunctional nanodevices.
ISSN: 2050-7526
EISSN: 2050-7534
DOI: 10.1039/c6tc04615k
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