Roger A. De Souza

Overview

Best Publications

• A family of oxide ion conductors based on the ferroelectric perovskite Na0.5Bi0.5TiO3

  Ming Li;Martha J. Pietrowski;Roger A. De Souza;Huairuo Zhang

  940
  Citations

• The formation of equilibrium space-charge zones at grain boundaries in the perovskite oxide SrTiO3

  Roger A. De Souza

  286
  Citations

• Behavior of oxygen vacancies in single-crystal SrTiO 3 : Equilibrium distribution and diffusion kinetics

  Roger A. De Souza;Veronika Metlenko;Daesung Park;Thomas E. Weirich

  270
  Citations

• A kinetic study of the decomposition of the cubic perovskite-type oxide BaxSr1−xCo0.8Fe0.2O3−δ (BSCF) (x = 0.1 and 0.5)

  David N. Mueller;Roger A. De Souza;Thomas E. Weirich;Daniel Roehrens

  224
  Citations

• Oxygen diffusion in nanocrystalline yttria-stabilized zirconia: the effect of grain boundaries

  Roger A. De Souza;Martha J. Pietrowski;Umberto Anselmi-Tamburini;Sangtae Kim

  206
  Citations

• A chemically driven insulator-metal transition in non-stoichiometric and amorphous gallium oxide.

  Lakshmi Nagarajan;Roger A. De Souza;Dominik Samuelis;Ilia Valov

  206
  Citations

• Formation and migration of cation defects in the perovskite oxide LaMnO3

  Roger A. De Souza;M. Saiful Islam;Ellen Ivers-Tiffée

  206
  Citations

• Do dislocations act as atomic autobahns for oxygen in the perovskite oxide SrTiO3

  Veronika Metlenko;Amr H. H. Ramadan;Felix Gunkel;Hongchu Du

  185
  Citations

• Modifying the barriers for oxygen-vacancy migration in fluorite-structured CeO2 electrolytes through strain: a computer simulation study

  Roger A. De Souza;Amr Ramadan;Stefanie Hörner

  161
  Citations

• Oxygen Diffusion in SrTiO3 and Related Perovskite Oxides

  Unknown

  149
  Citations

• On the conduction pathway for protons in nanocrystalline yttria-stabilized zirconia.

  Sangtae Kim;Hugo J. Avila-Paredes;Shizhong Wang;Chien-Ting Chen

  140
  Citations

• Spectromicroscopic insights for rational design of redox-based memristive devices

  Christoph Baeumer;Christoph Schmitz;Amr H.H. Ramadan;Hongchu Du;Hongchu Du

  139
  Citations

• Electrical and structural characterization of a low-angle tilt grain boundary in iron-doped strontium titanate

  Roger A. De Souza;Jürgen Fleig;Joachim Maier;Oliver Kienzle

  134
  Citations

• The thermodynamics and kinetics of iodine vacancies in the hybrid perovskite methylammonium lead iodide

  Denis Barboni;Roger A. De Souza

  123
  Citations

• Phase Stability and Oxygen Nonstoichiometry of Highly Oxygen-Deficient Perovskite-Type Oxides: A Case Study of (Ba,Sr)(Co,Fe)O3−δ

  David N. Mueller;Roger A. De Souza;Han-Ill Yoo;Manfred Martin;Manfred Martin

  121
  Citations

• A generalised space-charge theory for extended defects in oxygen-ion conducting electrolytes: from dilute to concentrated solid solutions

  David S. Mebane;Roger A. De Souza

  115
  Citations

• Using 18O/16O exchange to probe an equilibrium space-charge layer at the surface of a crystalline oxide: method and application

  Roger A. De Souza;Manfred Martin

  115
  Citations

• Computational Study of Oxygen Diffusion along a[100] Dislocations in the Perovskite Oxide SrTiO3

  Stephan P. Waldow;Roger A. De Souza

  109
  Citations

• Probing Diffusion Kinetics with Secondary Ion Mass Spectrometry

  Roger A. De Souza;Manfred Martin

  106
  Citations

• Electrical resistance of low-angle tilt grain boundaries in acceptor-doped SrTiO3 as a function of misorientation angle

  Roger A. De Souza;Jürgen Fleig;Joachim Maier;Zaoli Zhang

  96
  Citations

• SrTiO3: a model electroceramic

  Roger A. De Souza;Jürgen Fleig;Rotraut Merkle;Joachim Maier

  91
  Citations

• A universal empirical expression for the isotope surface exchange coefficients (k*) of acceptor-doped perovskite and fluorite oxides.

  Unknown

  53
  Citations