skip to main content

SciTech ConnectSciTech Connect

Title: Self-limited kinetics of electron doping in correlated oxides

Electron doping by hydrogenation can reversibly modify the electrical properties of complex oxides. We show that in order to realize large, fast, and reversible response to hydrogen, it is important to consider both the electron configuration on the transition metal 3d orbitals, as well as the thermodynamic stability in nickelates. Specifically, large doping-induced resistivity modulations ranging several orders of magnitude change are only observed for rare earth nickelates with small ionic radii on the A-site, in which case both electron correlation effects and the meta-stability of Ni{sup 3+} are important considerations. Charge doping via metastable incorporation of ionic dopants is of relevance to correlated oxide-based devices where advancing approaches to modify the ground state electronic properties is an important problem.
Authors:
; ; ; ;  [1] ; ;  [2] ;  [3] ; ;  [4] ;  [5]
  1. School of Engineering and Applied Sciences, Harvard University, Cambridge, Massachusetts 02138 (United States)
  2. Department of Physics, University of Arkansas, Fayetteville, Arkansas 72701 (United States)
  3. State Key Laboratory of Alternate Electrical Power System with Renewable Energy Source, North China Electric Power University, Beijing 102206 (China)
  4. CAS Key Laboratory of Materials for Energy Conversion, Shanghai institute of Ceramics, Chinese Academy of Sciences, Shanghai 200050 (China)
  5. Laboratory of Ion Beam Physics, ETH Zurich, Zurich 8093 (Switzerland)
Publication Date:
OSTI Identifier:
22486334
Resource Type:
Journal Article
Resource Relation:
Journal Name: Applied Physics Letters; Journal Volume: 107; Journal Issue: 3; Other Information: (c) 2015 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 RADII; DOPED MATERIALS; ELECTRICAL PROPERTIES; ELECTRON CORRELATION; ELECTRONS; EQUIPMENT; GROUND STATES; HYDROGEN; HYDROGENATION; KINETICS; MODULATION; NICKEL IONS; NICKELATES; OXIDES; RARE EARTHS; TRANSITION ELEMENTS