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Title: A conductive scanning study of La{sub 0.67}Sr{sub 0.33}MnO{sub 3}/Nb:SrTiO{sub 3} hetero-junction

Basing on conductive atomic force microscopy, we presented a direct conductance mapping for the interface of the La{sub 0.67}Sr{sub 0.33}MnO{sub 3}/Nb:SrTiO{sub 3} hetero-junction. The most remarkable observation is the presence of an interfacial layer in Nb:SrTiO{sub 3} adjacent to the manganite film. Within this layer, the AFM tip/Nb:SrTiO{sub 3} 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.
Authors:
; ; ; ; ; ;  [1]
  1. Beijing National Laboratory for Condensed Matter Physics and Institute of Physics, Chinese Academy of Sciences, Beijing 100190 (China)
Publication Date:
OSTI Identifier:
22489396
Resource Type:
Journal Article
Resource Relation:
Journal Name: Applied Physics Letters; Journal Volume: 108; Journal Issue: 5; Other Information: (c) 2016 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
71 CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS; ATOMIC FORCE MICROSCOPY; ELECTRIC POTENTIAL; FILMS; IMAGES; INTERFACES; LAYERS; MAPPING; SCHOTTKY BARRIER DIODES; STRONTIUM TITANATES