Results 31 to 40 of about 249,009 (286)

Boosting laboratory photoelectron spectroscopy by megahertz high-order harmonics

New Journal of Physics, 2015
Since the discovery of the photoelectric effect, photoelectron spectroscopy has evolved into the most powerful technique for studying the electronic structure of materials.
Cheng-Tien Chiang, Michael Huth, Andreas Trützschler, Mario Kiel, Frank O Schumann, Jürgen Kirschner, Wolf Widdra   +6 more
doaj   +1 more source

X-ray photoelectron spectroscopy of Sn₂P₂S₆ crystals

Condensed Matter Physics, 2008
The paper presents the X-ray photoelectron spectra (XPS) of the valence band (VB) and of the core levels (CL) of uniaxial ferroelectric Sn2P2S6 single crystals from different crystallographic planes in both paraelectric and ferroelectric phases.
J. Grigas, E. Talik, V. Lazauskas, Yu.M. Vysochanskii, R. Yevych, M. Adamiec, V. Nelkinas   +6 more
doaj   +1 more source

Harmonium: An Ultrafast Vacuum Ultraviolet Facility

CHIMIA, 2017
Harmonium is a vacuum ultraviolet (VUV) photon source built within the Lausanne Centre for Ultrafast Science (LACUS). Utilising high harmonic generation, photons from 20–110 eV are available to conduct steady-state or ultrafast photoelectron and
Christopher A. Arrell, Marco Grioni, Marcel Drabbels, Frank van Mourik, Andrew Clark, Gianmarco Gatti, Silvan Roth, Alberto Crepaldi, Luca Longetti, José Ojeda, Majed Chergui   +10 more
doaj   +1 more source

Innovative Processing of Compacted Waste Aluminum Alloy Powders via Controlled Remelting and Solidification

Advanced Engineering Materials, EarlyView.
This study demonstrates an efficient recycling route for out‐of‐spec AlSi10Mg atomized powders through compaction and arc remelting followed by suction casting. By correlating compaction load, cooling rate, and resulting microstructure, we show that intermediate pressures (50–80 kN) and rapid cooling refine dendrites, reduce porosity, and enhance ...
Mila Christy de Oliveira, Marcella Gaute Cavalcante Xavier, Abdoul‐Aziz Bogno, Piter Gargarella, José Eduardo Spinelli   +4 more
wiley   +1 more source

Collective contributions to the atomic Auger photoelectron coincidences on the (100), (110) and (111) facets of copper

Scientific Reports
For the Cu(100), Cu(110), and Cu(111) surfaces varying asymmetric line shapes are found for the atomic 3d84s2 multiplet two-hole final state binding energies reached in MVV Auger photoelectron coincidence spectroscopy. Higher asymmetry for Cu(111) and Cu(
Swarnshikha Sinha, Danilo Kühn, Fredrik. O. L. Johansson, Andreas Lindblad, Nils Mårtensson, Börje Johansson, Pavel A. Korzhavyi, Alexander Föhlisch   +7 more
doaj   +1 more source

Ultrafast Photolysis of o-Nitrophenol Studied by Time-Resolved Photoelectron Spectroscopy [PDF]

EPJ Web of Conferences, 2019
The formation of nitrous acid (HONO) through photolysis of o-nitrophenol was captured in real time by time-resolved photoelectron spectroscopy using single-order high harmonic probe pulses. HONO is released 250 fs after photoexcitation.
Nitta Yuki, Schalk Oliver, Kaneshima Keisuke, Sekikawa Taro   +3 more
doaj   +1 more source

Simulated XUV Photoelectron Spectra of THz-pumped Liquid Water

, 2019
Highly intense, sub-picosecond terahertz (THz) pulses can be used to induce ultrafast temperature jumps (T-jumps) in liquid water. A supercritical state of gas-like water with liquid density is established, and the accompanying structural changes are ...
Arnold, Caroline, Carbajo, Sergio, Inhester, Ludger, Santra, Robin, Welsch, Ralph   +4 more
core   +2 more sources

Triplet-Tuning: A Novel Family of Non-Empirical Exchange-Correlation Functionals [PDF]

, 2019
In the framework of DFT, the lowest triplet excited state, T$_1$, can be evaluated using multiple formulations, the most straightforward of which are UDFT and TDDFT.
Lin, Zhou, Van Voorhis, Troy
core   +4 more sources

Investigation of Laser Ablation and Brush Pre‐Treatments for AlCu Cold Roll Bonding in Oxygen‐Free Conditions

Advanced Engineering Materials, EarlyView.
It is shown that laser ablation pretreatment under oxygen‐free conditions enables copper–aluminium bonding at significantly lower deformation degrees and improved properties compared to mechanical brushing. Laser ablation further increases interface contact area and induces favourable residual stress states and microstructural compatibility ...
Khemais Barienti, Finn‐Lennard Janthur, Selina Raumel, Sascha Jan Zimmermann, Sarah Seffer, René Gustus, Sebastian Herbst, Marc C. Wurz, Ludger Overmeyer, Wolfgang Maus‐Friedrichs, Hans Jürgen Maier, Florian Nürnberger   +11 more
wiley   +1 more source

Direct observation of the on-site oxygen 2p two-hole Coulomb energy in La2CuO4

Nature Communications
Electron correlation in functional materials has remained a challenge with strong deviations of electronic structure from mean field approaches. In high temperature superconductors the electron-electron and hole-hole interaction energies are essential in
Danilo Kühn, Swarnshikha Sinha, Fredrik O. L. Johansson, Katarzyna Siewierska, Antonello Tebano, Nils Mårtensson, Andreas Lindblad, Daniele Di Castro, Alexander Föhlisch   +8 more
doaj   +1 more source