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Title: Electrically induced insulator to metal transition in epitaxial SmNiO{sub 3} thin films

We report on the electrically induced insulator to metal transition (IMT) in SmNiO{sub 3} thin films grown on (001) LaAlO{sub 3} by pulsed laser deposition. The behavior of the resistivity as a function of temperature suggests that the primary transport mechanism in the SmNiO{sub 3} insulating state is dominated by Efros-Shklovskii variable range hopping (ES-VRH). Additionally, the magnetic transition in the insulating state of SmNiO{sub 3} modifies the characteristics of the ES-VRH transport. Systematic DC and pulsed current-voltage measurements indicate that current-induced joule heating is the fundamental mechanism driving the electrically induced IMT in SmNiO{sub 3}. These transport properties are explained in context of the IMT in SmNiO{sub 3} being related to the strong electron-lattice coupling.
Authors:
; ;  [1] ; ; ;  [2]
  1. Department of Electrical Engineering, The Pennsylvania State University, University Park, Pennsylvania 16802 (United States)
  2. Department of Physics and Astronomy, West Virginia University, Morgantown, West Virginia 26506-6315 (United States)
Publication Date:
OSTI Identifier:
22304469
Resource Type:
Journal Article
Resource Relation:
Journal Name: Applied Physics Letters; Journal Volume: 105; Journal Issue: 1; Other Information: (c) 2014 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
75 CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY; ALUMINATES; COUPLING; CRYSTAL LATTICES; CURRENTS; ELECTRIC CONDUCTIVITY; ELECTRIC POTENTIAL; ELECTRONS; ENERGY BEAM DEPOSITION; EPITAXY; JOULE HEATING; LANTHANUM COMPOUNDS; LASER RADIATION; METALS; NICKELATES; PULSED IRRADIATION; PULSES; SAMARIUM COMPOUNDS; SUBSTRATES; TEMPERATURE DEPENDENCE; THIN FILMS