Physical properties of Cu/La0.67Ba0.33MnO3/SrTiO3 : Nb junctions with ultrathin manganite layers

被引：5
|
作者：
Gao, Weiwei [1 ,2 ]
Sun, Xuan [3 ]
Shen, Baogen [1 ,2 ]
Sun, Jirong [1 ,2 ]
机构：
[1] Chinese Acad Sci, Beijing Natl Lab Condensed Matter Phys, Beijing 100190, Peoples R China
[2] Chinese Acad Sci, Inst Phys, Beijing 100190, Peoples R China
[3] Beihang Univ, Dept Phys, Beijing 100080, Peoples R China
来源：
JOURNAL OF PHYSICS D-APPLIED PHYSICS | 2011年 / 44卷 / 02期
基金：
中国国家自然科学基金;
关键词：
D O I：
10.1088/0022-3727/44/2/025002
中图分类号：
O59 [应用物理学];
学科分类号：
摘要：
We performed a systematic study on a Cu/La0.67Ba0.33MnO3/SrTiO3 : Nb (Cu/LBMO/STON) junction with a manganite layer, a few unit cells in width, focusing on the evolution of Cu-STON coupling as the film thickness of LBMO grew. The physical properties of the junction are found to be jointly determined by the electrode, the film and the substrate when the film thickness of LBMO is below similar to 1 nm, with a carrier tunnelling process and a weakly rectifying feature. A LBMO film above similar to 1 nm completely screens the electrode-substrate interaction, enhancing the rectifying character of the junctions significantly. A further increase in film thickness leads only to a minor modification of the junctions.
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页数：5
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