Eric C. O’Quinn
YOU?
Author Swipe
View article: Persistence of small polarons into the superconducting doping range of <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"><mml:mrow><mml:msub><mml:mi>Ba</mml:mi><mml:mrow><mml:mn>1</mml:mn><mml:mo>−</mml:mo><mml:mi>x</mml:mi></mml:mrow></mml:msub><mml:msub><mml:mi mathvariant="normal">K</mml:mi><mml:mi>x</mml:mi></mml:msub><mml:msub><mml:mi>BiO</mml:mi><mml:mn>3</mml:mn></mml:msub></mml:mrow></mml:math>
Persistence of small polarons into the superconducting doping range of Open
Bipolaronic superconductivity is an exotic pairing mechanism proposed for materials like Ba1−xKxBiO3 (BKBO); however, conclusive experimental evidence for a (bi)polaron metallic state in this material remains elusive. Here, we combine reso…
View article: Neutron Total Scattering Experiments at High Pressure: Measuring Crystalline Structural Heterogeneity using the SNAP Instrument at the Spallation Neutron Source
Neutron Total Scattering Experiments at High Pressure: Measuring Crystalline Structural Heterogeneity using the SNAP Instrument at the Spallation Neutron Source Open
Exposure of materials to extreme pressure induces complex structural distortions, disorder, and phase transformations which effect their electronic, magnetic, and mechanical properties. These structural deviations, however, can be challeng…
View article: Oxygen Defect Configurations in Single-Phase UO<sub>2.15</sub>
Oxygen Defect Configurations in Single-Phase UO<sub>2.15</sub> Open
Hyperstoichiometric UO2.15 was characterized by neutron total scattering at high temperature in the single-phase UO2+x region of the U/O phase diagram. The diffraction data confirmed a single-phase fluorite structure at high temperature. A…
View article: Characterization of Disordered Nuclear Materials with Neutron Total Scattering Experiments
Characterization of Disordered Nuclear Materials with Neutron Total Scattering Experiments Open
A major obstacle to the development of next-generation energy technologies is the fabrication of materials that are structurally resilient within extreme environments that are characteristic of their operating conditions. Under far-from-eq…
View article: Atomic-scale structure of ZrO <sub>2</sub> : Formation of metastable polymorphs
Atomic-scale structure of ZrO <sub>2</sub> : Formation of metastable polymorphs Open
Metastable phases can exist within local minima in the potential energy landscape when they are kinetically “trapped” by various processing routes, such as thermal treatment, grain size reduction, chemical doping, interfacial stress, or ir…
View article: Atomic-scale structural analysis of metastable zirconia
Atomic-scale structural analysis of metastable zirconia Open
International audience
View article: Persistence of small polarons into the superconducting phase of Ba$_{1-x}$K$_x$BiO$_3$
Persistence of small polarons into the superconducting phase of Ba$_{1-x}$K$_x$BiO$_3$ Open
Bipolaronic superconductivity is an exotic pairing mechanism proposed for materials like Ba$_{1-x}$K$_x$BiO$_3$ (BKBO); however, conclusive experimental evidence for a (bi)polaron metallic state in this material remains elusive. Here, we c…
View article: Pyrochlore-type lanthanide titanates and zirconates: Synthesis, structural peculiarities, and properties
Pyrochlore-type lanthanide titanates and zirconates: Synthesis, structural peculiarities, and properties Open
This contribution provides a thorough examination of the structural characteristics of pyrochlore-type lanthanide titanates and zirconates Ln2Ti2O7 and Ln2Zr2O7, across various length scales. This paper also examines their processing, inte…
View article: Response of ZrC to swift heavy ion irradiation
Response of ZrC to swift heavy ion irradiation Open
Zirconium carbide (ZrC) is commonly used for energy sector research, as well as a surrogate for the proposed advanced nuclear fuel candidate uranium carbide. This study investigates structural modifications to nanocrystalline and microcrys…
View article: Systematic study of short- and long-range correlations in RE<sub>3</sub>TaO<sub>7</sub> weberite-type compounds by neutron total scattering and X-ray diffraction
Systematic study of short- and long-range correlations in RE<sub>3</sub>TaO<sub>7</sub> weberite-type compounds by neutron total scattering and X-ray diffraction Open
The atomic structures of the lanthanide tantalates, Ln 3 TaO 7 , series (Ln = Pr, Tb, Dy, Ho, Tm, Yb) were systematically investigated using total scattering techniques.
View article: Cation Short-Range Ordering of MgAl<sub>2</sub>O<sub>4</sub> and NiAl<sub>2</sub>O<sub>4</sub> Spinel Oxides at High Temperatures via <i>In Situ</i> Neutron Total Scattering
Cation Short-Range Ordering of MgAl<sub>2</sub>O<sub>4</sub> and NiAl<sub>2</sub>O<sub>4</sub> Spinel Oxides at High Temperatures via <i>In Situ</i> Neutron Total Scattering Open
Complex oxides that adopt the isometric spinel structure (AB2O4) are important for numerous technological applications and are relevant for certain geological processes, which involve exposure to extreme environments such as high pressures…
View article: Defining the Structural Stability Field of Disordered Fluorite Oxides
Defining the Structural Stability Field of Disordered Fluorite Oxides Open
Fluorite-structured oxides constitute an important class of materials for energy technologies. Despite their high level of structural symmetry and simplicity, these materials can accommodate atomic disorder without losing crystallinity, ma…
View article: Transformations to amorphous and X-type phases in swift heavy ion-irradiated Ln2O3 and Mn2O3
Transformations to amorphous and X-type phases in swift heavy ion-irradiated Ln2O3 and Mn2O3 Open
The intense, highly localized electronic excitation resulting from swift heavy ion irradiation induces phase transformations in many materials including lanthanide sesquioxides (Ln2O3). To explore the effects of chemical composition on rad…
View article: Multi-scale investigation of heterogeneous swift heavy ion tracks in stannate pyrochlore
Multi-scale investigation of heterogeneous swift heavy ion tracks in stannate pyrochlore Open
A multi-scale approach revealed the complex swift heavy ion track morphology in Er2Sn2O7 pyrochlore. Diffraction and electron microscopy probed phase transformations while neutron pair distribution function analysis elucidated short-range …
View article: Predicting short-range order and correlated phenomena in disordered crystalline materials
Predicting short-range order and correlated phenomena in disordered crystalline materials Open
Short-range structure in disordered materials can be predicted by application of Pauling’s rules.
View article: Characterization of Radiation Effects and Ion Tracks with Spallation Neutron Probes
Characterization of Radiation Effects and Ion Tracks with Spallation Neutron Probes Open
Swift heavy ions are typically defined as high-mass charged particles of kinetic energy above ~1 MeV per nucleon (MeV/u). In this regime, the energy deposition of the ions is dominated by electronic stopping, and each individual ion may in…
View article: Disorder in Ho<sub>2</sub>Ti<sub>2−x</sub>Zr<sub>x</sub>O<sub>7</sub>: pyrochlore to defect fluorite solid solution series
Disorder in Ho<sub>2</sub>Ti<sub>2−x</sub>Zr<sub>x</sub>O<sub>7</sub>: pyrochlore to defect fluorite solid solution series Open
Combined neutron and X-ray total scattering with calorimetric measurements of the solid solution series Ho2Ti2−xZrxO7 reveals a complex order–disorder transition across short, intermediate, and long length scales induced by chemical substi…