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Tuning the phase separation in La0.325Pr0.3Ca0.375MnO3 using theelectric double-layer field effect |
Cui Li-Min (崔丽敏), Li Jie (李洁), Zhang Yu (张玉), Zhao Lu (赵璐), Deng Hui (邓辉), Huang Ke-Qiang (黄克强), Li He-Kang (李贺康), Zheng Dong-Ning (郑东宁) |
Beijing National Laboratory for Condensed Matter Physics, Institute of Physics, Chinese Academy of Sciences, Beijing 100190, China |
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Abstract Electric double-layer field effect experiments were performed on ultrathin films of La0.325Pr0.3Ca0.375MnO3, which is noted for its micrometer-scale phase separation. A clear change of resistance up to 220% was observed and the characteristic metal-insulator transition temperature TP was also shifted. The changes of both the resistance and TP suggest that the electric field induced not only tuning of the carrier density but also rebalancing of the phase separation states. The change of the charge-ordered insulating phase fraction was estimated to be temperature dependent, and a maximum of 16% was achieved in the phase separation regime. This tuning effect was partially irreversible, which might be due to an oxygen vacancy migration that is driven by the huge applied electric field.
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Received: 08 April 2013
Revised: 16 May 2014
Accepted manuscript online:
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PACS:
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85.30.Tv
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(Field effect devices)
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78.30.cd
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(Solutions and ionic liquids)
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64.75.Gh
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(Phase separation and segregation in model systems (hard spheres, Lennard-Jones, etc.))
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Fund: Project supported by the National Basic Research Program of China (Grant Nos. 2011CBA00106 and 2014CB921401) and the National Natural Science Foundation of China (Grant Nos. 11174342, 9131208, and 11374344). |
Corresponding Authors:
Zheng Dong-Ning
E-mail: dzheng@iphy.ac.cn
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Cite this article:
Cui Li-Min (崔丽敏), Li Jie (李洁), Zhang Yu (张玉), Zhao Lu (赵璐), Deng Hui (邓辉), Huang Ke-Qiang (黄克强), Li He-Kang (李贺康), Zheng Dong-Ning (郑东宁) Tuning the phase separation in La0.325Pr0.3Ca0.375MnO3 using theelectric double-layer field effect 2014 Chin. Phys. B 23 098501
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