Anomalous lattice dynamics and thermal behavior have been observed for ligand-free, size-, and shapeselected Pt nanoparticles NPs supported on nanocrystalline -Al2O3 via extended x-ray absorption finestructure spectroscopy. Several major differences were observed for the NPs with respect to bulk Pt: i a contraction in the interatomic distances, ii a reduction in the dynamic temperature-dependen...

New relativistic approach to computing the spectral parameters of multicharged ions in plasmas for different values screening (Debye) parameter (respectively, electron density, temperature) is presented. The presented based on generalized energy combined with optimized many-body perturbation theory Dirac-Debye hamiltonian as a zeroth approximation, adapted application study and atoms plasmas. s...

C. Castelnovo,1,2 R. Moessner,3 and S. L. Sondhi4 1Rudolf Peierls Centre for Theoretical Physics, University of Oxford, Oxford OX1 3NP, United Kingdom 2SEPnet and Hubbard Theory Consortium, Department of Physics, Royal Holloway University of London, Egham TW20 0EX, United Kingdom 3Max-Planck-Institut für Physik komplexer Systeme, D-01187 Dresden, Germany 4Department of Physics, Princeton Univer...

We present an efficient and accurate method for directly calculating single and multiple scattering X-ray absorption fine structure (XAFS) thermal Debye-Waller factors for Fe –porphiryn complexes. The number of multiple scattering Debye-Waller factors on metal porphyrin centers exceeds the number of available parameters that XAFS experimental data can support during fitting with simulated spect...

von-Kbrm'an scattering on surface Using correlation coefficients calculated i p the Born model, the temperature variation of low energy ion spectra is shown to be capable of giving information Debye temperatures but not on detailed aspects of surface phonons.

In this research cobalt ferrite (CoFe2O4) nano-crystalline powders were prepared by simple chemical precipitation method using cobalt sulfate. The CoFe2O4 nanoparticles were characterized by X-ray diffraction, scanning electron microscopy  and Fourier transform infra-red spectroscopy. The crystallite size of CoFe2O4 nanoparticles was calculated by Debye–Scherrer formula. The effect of precursor...