Interpretation of meV Resolution Phonon EELS Data

Atomic resolution mapping of phonon excitations in STEM-EELS experiments.

Atomically resolved electron energy-loss spectroscopy experiments are commonplace in modern aberration-corrected transmission electron microscopes. Energy resolution has also been increasing steadily with the continuous improvement of electron monochromators. Electronic excitations however are known to be delocalized due to the long range interaction of the charged accelerated electrons with th...

Exploring Phonon Signals by High Energy / High Spatial Resolution EELS

1 Nion Co., 1102 Eight St, Kirkland, WA 98033, USA 2 Center for Solid State Science, Arizona State University, Tempe, AZ 85287, USA 3 Department of Chemistry and Biochemistry, Arizona State University, Tempe, AZ 85287, USA 4 School for Engineering of Matter, Transport and Energy, ASU, Tempe, AZ 85287, USA 5 Department of Physics, ASU, Tempe, AZ 85287, USA 6 Department of Physics, University of ...

Recent Applications of Sub-20 meV Monochromated STEM-EELS : from Phonon to Core Losses in Real and Momentum Spaces

Phonon and magnetic neutron scattering at 41 meV in YBa2Cu3O7.

We report inelastic neutron scattering measurements at excitation energies h̄v , 41 meV in YBa 2Cu 3O 7. We separate magnetic and phonon contributions to the scattering cross section by a detailed analysis of the momentum dependence of the scattered intensity. The previously reported broad peak around q ­ spya, pyad in the normal state can be entirely accounted for by a phonon which primarily in...

An Algorithm for Modeling and Interpretation of Seismoelectric Data

Generally speaking, seismoelectric modeling is a prospecting method based on seismic and electromagnetic waves, in which waves generated by a seismic source at the boundary of the two environments generate a relative fluid-solid motion formed as a result of antagonism between the elastic properties of the environment with the saturated fluid. This research has as its objective, a study of the e...