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Title: The electrochemical impact on electrostatic modulation of the metal-insulator transition in nickelates

For physical studies of correlated electron systems and for realizing novel device concepts, electrostatic modulation of metal-insulator transitions (MITs) is desired. The inherently high charge densities needed to modulate MITs make this difficult to achieve. The high capacitance of ionic liquids are attractive but, voltages are needed that can be in excess of the electrochemical stability of the system. Here, we show temperature/resistivity data that suggest electrostatic modulation of the MIT temperature of NdNiO{sub 3} in a wide regime. However, additional voltammetric and x-ray photoelectron spectroscopy measurements demonstrate the electrochemical impact of the electrostatic doping approach with ionic liquids.
Authors:
; ; ;  [1] ;  [2] ;  [3]
  1. Materials Research Laboratory (MRL), University of California Santa Barbara (UCSB), California 93106 (United States)
  2. California Nanosystems Institute (CNSI), University of California Santa Barbara (UCSB), California 93106 (United States)
  3. Materials Department, University of California Santa Barbara (UCSB), California 93106 (United States)
Publication Date:
OSTI Identifier:
22398772
Resource Type:
Journal Article
Resource Relation:
Journal Name: Applied Physics Letters; Journal Volume: 106; Journal Issue: 12; Other Information: (c) 2015 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; CAPACITANCE; CHARGE DENSITY; ELECTRIC POTENTIAL; ELECTROCHEMISTRY; ELECTRON CORRELATION; LIQUIDS; MODULATION; NEODYMIUM COMPOUNDS; NICKELATES; PHASE STABILITY; PHASE TRANSFORMATIONS; POLAROGRAPHY; X-RAY PHOTOELECTRON SPECTROSCOPY