Applied Surface Science, Vol.399, 346-350, 2017
Metal-insulator transition in epitaxial NdNiO3 thin film: A structural, electrical and optical study
NdNiO3 thin film has been prepared by pulsed laser deposition on LaAlO3 (001) single crystalline substrate. Temperature-dependent resistivity measurement shows a sharp metal-insulator transition in such thin film. The phase transition temperature can be tuned from 90K to 121 K by changing the thickness of thin film. The structure evolution during phase transition is studied by Raman spectroscopy. Optical conductivity reveals that the variation carrier density in the process of phase transition. The results of structural, electrical and optical studies provide useful insights to understand the mechanism of metal-insulator transition of NdNiO3 thin film. (C) 2016 Elsevier B.V. All rights reserved.
Keywords:Metal-insulator transition;Pulsed laser deposition;Raman spectrum;Optical conductivity;NiO6 octahedra