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15 papers · 2 filters
Interface and electronic characterization of thin epitaxial Co3O4 films
C. A. F. Vaz, H. -Q. Wang, C. H. Ahn +10
The interface and electronic structure of thin (~20-74 nm) Co3O4(110) epitaxial films grown by oxygen-assisted molecular beam epitaxy on MgAl2O4(110) single crystal substrates have…
Relationship between the atomic pair distribution function and small angle scattering: implications for modeling of nanoparticles
Christopher L. Farrow, Simon J. L. Billinge
Here we show explicitly the relationship between the functions used in the atomic pair distribution function (PDF) method and those commonly used in small angle scattering (SAS) an…
Local Structure of Thermoelectric Ca3Co4O9
T. A. Tyson, Z. Chen, Q. Jie +2
We have combined temperature dependent local structural measurements with first principles density functional calculations to develop a three dimensional local structure model of t…
Measurement of the Optical Conductivity of Graphene
Kin Fai Mak, Matthew Y. Sfeir, Yang Wu +3
Optical reflectivity and transmission measurements over photon energies between 0.2 and 1.2 eV were performed on single-crystal graphene samples on a transparent SiO2 substrate. Fo…
High CO tolerance of Pt/Ru nano-catalyst: insight from first principles calculation
Sergey Stolbov, Marisol Alcantara Ortigoza, Radoslav Adzic +1
Density functional theory based calculations of the energetics of adsorption and diffusion of CO on Pt islets and on the Ru(0001) substrate show that CO has the lowest adsorption e…
Dynamic origin of the morphotropic phase boundary - Soft modes and phase instability in 0.68Pb(Mg1/3Nb2/3O3)-0.32PbTiO3
Hu Cao, Chris Stock, Guangyong Xu +3
We report neutron inelastic scattering on single crystal 0.68Pb(Mg1/3Nb2/3O3)-0.32PbTiO3 (PMN-0.32PT), a relaxor ferroelectric material that lies within the compositional range of…