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Quantification of diffuse scattering in glass and polymers by parametric power law analysis of UV to NIR light
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Heterodyne x-ray diffuse scattering from coherent phonons
Here, we report Fourier-transform inelastic x-ray scattering measurements of photoexcited GaAs with embedded ErAs nanoparticles. We observe temporal oscillations in the x-ray scattering intensity, which we attribute to inelastic scattering from coherent acoustic phonons. Unlike in thermal equilibrium, where inelastic x-ray scattering is proportional to the phonon occupation, we show that the scattering is proportional to the phonon amplitude for coherent states. The wavevectors of the observed phonons extend beyond the excitation wavevector. The nanoparticles break the discrete translational symmetry of the lattice, enabling the generation of large wavevector coherent phonons. Elastic scattering of x-ray photons from the nanoparticles provides a reference for heterodyne mixing, yielding signals proportional to the phonon amplitude.
Nanoscale Order in Molecular Systems from Single Crystal Diffuse Scattering
Abstract not provided
Theory of magnon diffuse scattering in scanning transmission electron microscopy
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Frustration-induced diffusive scattering anomaly and dimension change in FeGe 2
Magnetic frustration, arising from the competition of exchange interactions, has received great attention because of its relevance to exotic quantum phenomena in materials. In the current work, we report an unusual checkerboard-shaped scattering anomaly in FeGe 2 , far from the known incommensurate magnetic satellite peaks, by inelastic neutron scattering. More surprisingly, such phenomenon appears as spin dynamics at low temperature, but it becomes prominent above Néel transition as elastic scattering. Here, a model Hamiltonian that includes an intraplane next-nearest neighbor was proposed and such anomaly is attributed to the near-perfect magnetic frustration and the emergence of unexpected two-dimensional magnetic order in the quasi-one-dimensional FeGe 2 .
Unveiling the impact of temperature on magnon diffuse scattering detection in the transmission electron microscope
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X-ray diffuse scattering study of vacancy nanoclusters in homoepitaxial Ag(001) films
Abstract not provided
Thermal Diffuse Scattering as a Probe of Large-Wave-Vector Phonons in Silicon Nanostructures
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Using Diffuse Scattering to Observe X-Ray-Driven Nonthermal Melting
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Use of Bond Valence Sums in Modelling the Diffuse Scattering from PZN
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Determination of phonon dispersion relations by X-ray thermal diffuse scattering
Abstract not provided