Results 1 to 10 of about 472,937 (183)

Structural dynamics of incommensurate charge-density waves tracked by ultrafast low-energy electron diffraction [PDF]

open access: yesStructural Dynamics, 2020
We study the non-equilibrium structural dynamics of the incommensurate and nearly commensurate charge-density wave (CDW) phases in 1T- TaS 2. Employing ultrafast low-energy electron diffraction with 1 ps temporal resolution, we investigate the ...
G. Storeck   +7 more
doaj   +2 more sources

Sub-ångström resolution ptychography in a scanning electron microscope at 20 keV [PDF]

open access: yesNature Communications
Achieving sub-ångström (30 keV) beam and a transmission electron microscope (TEM) fitted with an aberration corrector and a high efficiency, high pixel-count camera.
Arthur M. Blackburn   +3 more
doaj   +2 more sources

Optical fiber-driven low-energy electron gun for time-resolved streak diffraction [PDF]

open access: yesEPJ Web of Conferences, 2019
The wave guiding feature of the optical fibre optical fibres is specifically exploited to construct a novel type of electron gun to realize single-shot low-energy electron diffraction experiments with the sub-picosecond resolution for studying ...
Lee Chiwon   +2 more
doaj   +1 more source

Disentangling surface atomic motions from surface field effects in ultrafast low-energy electron diffraction

open access: yesCommunications Materials, 2022
Ultrafast low-energy electron diffraction allows the direct observation of atomic motions in structural transitions, but is accompanied by a strong photoinduced emission resulting in surface field effects. Here, these effects are quantified, enabling the
Chiwon Lee   +3 more
doaj   +1 more source

One-Step Theory View on Photoelectron Diffraction: Application to Graphene

open access: yesNanomaterials, 2022
Diffraction of photoelectrons emitted from the core 1s and valence band of monolayer and bilayer graphene is studied within the one-step theory of photoemission. The energy-dependent angular distribution of the photoelectrons is compared to the simulated
Eugene Krasovskii
doaj   +1 more source

Influence of cold deformation on microstructure, crystallographic orientation and tensile properties of an experimental austenitic Fe–26Mn-0.4C steel

open access: yesJournal of Materials Research and Technology, 2022
The correlation between microstructure, crystallographic orientation and grain boundaries characteristics of an austenitic high manganese steel was systematically investigated.
Marcos Natan da Silva Lima   +7 more
doaj   +1 more source

Optimum technological modes of ion implantation and subsequent annealing for formation of thin nanosized silicide films [PDF]

open access: yesE3S Web of Conferences, 2021
Using the methods of electron spectroscopy and slow electron diffraction, we studied the processes of the formation of nanosized metal silicide films in the near-surface region of Si (111) and Si (100) during low-energy implantation of Ba ions and ...
Bekpulatov Ilkhom   +3 more
doaj   +1 more source

Structural phase transitions and phase ordering at surfaces probed by ultrafast LEED [PDF]

open access: yesEPJ Web of Conferences, 2019
We demonstrate the capability of ultrafast low-energy electron diffraction to resolve phase-ordering kinetics and structural phase transitions on their intrinsic time scales with ultimate surface sensitivity.
Horstmann Jan Gerrit   +8 more
doaj   +1 more source

Low-energy electron diffraction from disordered surfaces [PDF]

open access: yes, 1978
Model calculations are presented of L E E D intensities diffracted by a onedimensionally disordered overlayer adsorbed on a well ordered substrate. Multiple scattering amplitudes are calculated by an extension of Beeby's multiple scattering method ...
Moritz, Wolfgang
core   +1 more source

Anomalous Decay of Electronically Stabilized Lead Mesas on Ni(111)\ud [PDF]

open access: yes, 2011
With their low surface free energy, lead films tend to wet surfaces. However, quantum size effects (QSE) often lead to islands with distinct preferred heights. We study thin lead films on Ni(111) using low energy electron microscopy and selected area low
Bollmann, Tjeerd R.J.   +3 more
core   +2 more sources

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