Results 1 to 10 of about 467,963 (275)

Structural dynamics at surfaces by ultrafast reflection high-energy electron diffraction [PDF]

Structural Dynamics
Many fundamental processes of structural changes at surfaces occur on a pico- or femtosecond timescale. In order to study such ultrafast processes, we have combined modern surface science techniques with fs-laser pulses in a pump–probe scheme.
Michael Horn-von Hoegen
doaj   +8 more sources

Reflection High-Energy Electron Diffraction oscillations during epitaxial growth of artificially layered films of (BaCuOx)m /(CaCuO2)n [PDF]

arXiv, 2000
Pulsed Laser Deposition in molecular-beam epitaxy environment (Laser-MBE) has been used to grow high quality BaCuOx/CaCuO2 superlattices. In situ Reflection High Energy Electron Diffraction (RHEED) shows that the growth mechanism is 2-dimensional. Furthermore, weak but reproducible RHEED intensity oscillations have been monitored during the growth.
Balestrino, G., Lavanga, S., Martellucci, S., Medaglia, P. G., Paoletti, A., Pasquini, G., Petrocelli, G., Tebano, A., Tucciarone, A.   +8 more
arxiv   +7 more sources

sim-trhepd-rheed -- Open-source simulator of total-reflection high-energy positron diffraction (TRHEPD) and reflection high-energy electron diffraction (RHEED) [PDF]

Computer Physics Communications 277, 108371/1-10 (2022), 2021
The present paper reports sim-trhepd-rheed (STR), an open-source simulator of total-reflection high-energy positron diffraction (TRHEPD) and reflection high-energy electron diffraction (RHEED) experiments which are used for atom-scale surface structure determination of a material.
Takashi Hanada, Yuichi Motoyama, Kazuyoshi Yoshimi, Takeo Hoshi   +3 more
arxiv   +7 more sources

Ultrafast time resolved reflection high energy electron diffraction with tilted pump pulse fronts [PDF]

EPJ Web of Conferences, 2013
We present time-resolved RHEED from a laser excited Pb(111) surface using a pulse front tilter for the compensation of the velocity mismatch of electrons and light.
Bovensiepen U., Ligges M., Kammler M., Hanisch-Blicharski A., Wall S., Frigge T., Kalus A., Streubühr C., Zhou P., von der Linde D., Horn-von Hoegen M.   +10 more
doaj   +2 more sources

Comparison of azimuthal plots for reflection high-energy positron diffraction (RHEPD) and reflection high-energy electron diffraction (RHEED) for Si(111) surface. [PDF]

Acta Crystallogr A Found Adv, 2020
Azimuthal plots for RHEPD (reflection high-energy positron diffraction) and RHEED (reflection high-energy electron diffraction) were calculated using dynamical diffraction theory and then compared. It was assumed that RHEPD and RHEED azimuthal plots can be collected practically by recording the intensity while rotating the sample around the axis ...
Mitura Z.
europepmc   +5 more sources

Single-Shot Electron Diffraction using a Cold Atom Electron Source [PDF]

J. Phys. B: At. Mol. Opt. Phys. 48 (2015) 214002, 2015
Cold atom electron sources are a promising alternative to traditional photocathode sources for use in ultrafast electron diffraction due to greatly reduced electron temperature at creation, and the potential for a corresponding increase in brightness. Here we demonstrate single-shot, nanosecond electron diffraction from monocrystalline gold using cold ...
McCulloch, Andrew J., Nugent, Keith A., Putkunz, Corey T., Scholten, Robert E., Sparkes, Benjamin M., Speirs, Rory W.   +5 more
arxiv   +5 more sources

Pulsed laser deposition assisted epitaxial growth of cesium telluride photocathodes for high brightness electron sources [PDF]

Scientific Reports
The development of high-brightness electron sources is critical to state-of-the-art electron accelerator applications like X-ray free electron laser (XFEL) and ultra-fast electron microscopy. Cesium telluride is chosen as the electron source material for
Kali Prasanna Mondal, Mengjia Gaowei, Elena Echeverria, Kenneth Evans-Lutterodt, Jean Jordan-Sweet, Thomas Juffmann, Siddharth Karkare, Jared Maxson, S. J. van der Molen, Chad Pennington, Pallavi Saha, John Smedley, W. G. Stam, Rudolf M. Tromp   +13 more
doaj   +2 more sources

Growth of strontium ruthenate films by hybrid molecular beam epitaxy

APL Materials, 2017
We report on the growth of epitaxial Sr2RuO4 films using a hybrid molecular beam epitaxy approach in which a volatile precursor containing RuO4 is used to supply ruthenium and oxygen.
Patrick B. Marshall, Honggyu Kim, Kaveh Ahadi, Susanne Stemmer   +3 more
doaj   +3 more sources

Practice of the Analysis of Reflection High-Energy Electron Diffraction Pattern

Hyomen Kagaku, 2004
Analyses and assignments of reflection high-energy electron diffraction patterns of Si(100) surfaces are demonstrated for the practice. Several check points for the RHEED analysis are described.
Tomohide Takami
openalex   +3 more sources

GARFIELD, a toolkit for interpreting ultrafast electron diffraction data of imperfect quasi-single crystals. [PDF]

Struct Dyn
The analysis of ultrafast electron diffraction (UED) data from low-symmetry single crystals of small molecules is often challenged by the difficulty of assigning unique Laue indices to the observed Bragg reflections. For a variety of technical and physical reasons, UED diffraction images are typically of lower quality when viewed from the perspective ...
Marx A, Epp SW.
europepmc   +2 more sources