A conductive scanning study of La0.67Sr0.33MnO3/Nb:SrTiO3 hetero-junction

被引：2
作者：
Lu, H. X.
Zhang, J.
Zhang, H. R.
Li, Y.
Chen, Y. S. [1 ]
Shen, B. G.
Sun, J. R. [1 ]
机构：
[1] Chinese Acad Sci, Beijing Natl Lab Condensed Matter Phys, Beijing 100190, Peoples R China
来源：
APPLIED PHYSICS LETTERS | 2016年 / 108卷 / 05期
基金：
中国国家自然科学基金;
关键词：
D O I：
10.1063/1.4941419
中图分类号：
O59 [应用物理学];
学科分类号：
摘要：
Basing on conductive atomic force microscopy, we presented a direct conductance mapping for the interface of the La0.67Sr0.33MnO3/Nb:SrTiO3 hetero-junction. The most remarkable observation is the presence of an interfacial layer in Nb:SrTiO3 adjacent to the manganite film. Within this layer, the AFM tip/Nb:SrTiO3 contact shows a current-voltage dependence that strongly deviates from Shockley equation, unlike a Schottky diode. Spatial extension of this layer is explored and possible transport mechanism in or outside this interfacial layer is discussed. The present work gives a direct intuitional image on the interface of manganite junction. The principle proven here can be extended to other complex oxide interfaces. (C) 2016 AIP Publishing LLC.
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页数：5
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