Publication
Thickness dependent loss function of Si with 0.14 eV energy resolution
Publications associées (63)
Electron spectrometer calibration method
Tobias Kippenberg, Fabrizio Carbone, Alexey Sapozhnik, Yujia Yang, Thomas La Grange, Arslan Sajid Raja
The present invention concerns an energy dispersion calibration method for calibrating an electron spectrometer of an electron spectrometer system including at least one electron emission source, electron optics and the electron spectrometer. The method co ...
2023Ultrafast Transverse Modulation of Free Electrons by Interaction with Shaped Optical Fields
Fabrizio Carbone, Alexey Sapozhnik, Phoebe Marie Tengdin, Giovanni Maria Vanacore, Ivan Madan, Ido Kaminer, Simone Gargiulo, Francesco Barantani, Veronica Leccese
Spatiotemporal electron-beam shaping is a bold frontier of electron microscopy. Over the past decade, shaping methods evolved from static phase plates to low-speed electrostatic and magnetostatic displays. Recently, a swift change of paradigm utilizing lig ...
AMER CHEMICAL SOC2022Waveguide modes spatially resolved by low-loss STEM-EELS
Duncan Thomas Lindsay Alexander
In an era of new developments in nanomaterials analysis enabled by the unprecedented spatial and energy resolutions of electron energy-loss spectroscopy in the scanning transmission electron microscope (STEM-EELS), it remains that the vast majority of work ...
2021Near-Atomic-Scale Mapping of Electronic Phases in Rare Earth Nickelate Superlattices
Duncan Thomas Lindsay Alexander, Bernat Mundet, Jean-Marc Triscone
Nanoscale mapping of the distinct electronic phases characterizing the metal-insulator transition displayed by most of the rare-earth nickelate compounds is fundamental for discovering the true nature of this transition and the possible couplings that are ...
AMER CHEMICAL SOC2021Study of He*/Ne*+Ar, Kr, N2, H2, D2 Chemi-Ionization Reactions by Electron Velocity-Map Imaging
Andreas Osterwalder, Sean Dennis Steven Gordon, Junwen Zou, Silvia Tanteri
The chemi-ionization of Ar, Kr, N2, H2, and D2 by Ne(3P2) and of Ar, Kr, and N2 by He(3S1) was studied by electron velocity map imaging (e-VMI) in a crossed molecular beam experiment. A curved magnetic hexapole was used to state-select the metastable speci ...
2021A method to numerically determine the secondary electron yield considering effects of the surface morphology
Secondary electron emission (SEE) of solid materials due to electron bombardment is influenced by numerous properties of materials, where the surface condition plays a critical role in the value of secondary electron yield (SEY). Here, a 3D random microstr ...
2021Structure evolution, bandgap, and dielectric function in La-doped hafnium oxide thin layer subjected to swift Xe ion irradiation
Philippe Buffat, Elena Suvorova Buffat
High-resolution transmission electron microscopy, electron diffraction, and electron energy-loss spectroscopy provide information on the structural evolution, dielectric function, and bandgap values of nanocrystalline 10nm thick lanthanum doped hafnia (La: ...
AMER INST PHYSICS2020Substrate-Selective Morphology of Cesium Iodide Clusters on Graphene
Klaus Kern, Yi Wang, Marko Burghard, Stephan Rauschenbach, Sabine Abb, Sven Alexander Szilagyi, Hannah Julia Ochner
Formation and characterization of low-dimensional nanostructures is crucial for controlling the properties of two-dimensional (2D) materials such as graphene. Here, we study the structure of low-dimensional adsorbates of cesium iodide (CsI) on freestanding ...
2020Visualizing the importance of oxide-metal phase transitions in the production of synthesis gas over Ni catalysts
Synthesis gas, composed of H-2 and CO, is an important fuel which serves as feedstock for industrially relevant processes, such as methanol or ammonia synthesis. The efficiency of these reactions depends on the H-2 : CO ratio, which can be controlled by a ...
2020Electron energy loss spectroscopy of bulk gold with ultrasoft pseudopotentials and the Liouville-Lanczos method
The implementation of ultrasoft pseudopotentials into time-dependent density-functional perturbation theory is detailed for both the Sternheimer approach and the Liouville-Lanczos (LL) method, and equations are presented in the scalar relativistic approxim ...
AMER PHYSICAL SOC2020