On microscopic origin of photovoltaic effect in La0.8Sr0.2MnO3 films

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	On microscopic origin of photovoltaic effect in La0.8Sr0.2MnO3 films
	K. Zhao; Y. H. Huang; H. B. Lu; M. He; K. J. Jin; G. Z. Yang
	2005
发表期刊	Journal of Rare Earths
ISSN	1002-0721
卷号	23 期号:5 页码:526-529
摘要	The anomalous photovoltaic effect was studied in epitaxial La0.8Sr0.2MnO3 films by laser molecular beam epitaxy. It is demonstrated that the signal polarity is reversed when the films are irradiated through the substrate rather than the film. Electron microdiffration and high-resolution imaging reveal that La0.8Sr0.2MnO3 thin film is epitaxially grown on the substrate, and the oriented microdomains run through the thickness of film, forming a columnar structure. Detailed investigations of the distribution of electric potential in the film surface with respect to the location of laser spot suggest that the anomalous photovoltaic response is due to an asymmetry of oriented microdomains in thin film. Under ultraviolet laser irradiation, the electron-hole pairs are excited in the manganese oxide film. The asymmetry of microdomains generates a built-in electric field and induces an asymmetric transport of the excited carriers, and hence a a photo voltage signal is obtained.
部门归属	chinese acad sci, inst phys, beijing natl lab condensed matter phys, beijing 100080, peoples r china. liaocheng univ, dept phys, liaocheng 252059, peoples r china. chinese acad sci, int ctr mat phys, shenyang 110016, peoples r china.;zhao, k (reprint author), chinese acad sci, inst phys, beijing natl lab condensed matter phys, beijing 100080, peoples r china;ainiphoto@163.com
关键词	Colossal Magnetoresistance Thin Film Photovoltaic Effect Microscopy Rare Earths Molecular-beam Epitaxy
URL	查看原文
WOS记录号	WOS:000233064400003
引用统计	被引频次：2[WOS] [WOS记录] [WOS相关记录]
文献类型	期刊论文
条目标识符	http://ir.imr.ac.cn/handle/321006/35264
专题	中国科学院金属研究所
推荐引用方式 GB/T 7714	K. Zhao,Y. H. Huang,H. B. Lu,et al. On microscopic origin of photovoltaic effect in La0.8Sr0.2MnO3 films[J]. Journal of Rare Earths,2005,23(5):526-529.
APA	K. Zhao,Y. H. Huang,H. B. Lu,M. He,K. J. Jin,&G. Z. Yang.(2005).On microscopic origin of photovoltaic effect in La0.8Sr0.2MnO3 films.Journal of Rare Earths,23(5),526-529.
MLA	K. Zhao,et al."On microscopic origin of photovoltaic effect in La0.8Sr0.2MnO3 films".Journal of Rare Earths 23.5(2005):526-529.