55 citations · 143 across the 8 of their papers we have counts for
10 papers
Generation of Large Vortex-Free Superfluid Helium Nanodroplets
Anatoli Ulmer, Andrea Heilrath, Björn Senfftleben +38
Superfluid helium nanodroplets are an ideal environment for the formation of metastable, self-organized dopant nanostructures. However, the presence of vortices often hinders their…
A Rate Model of Electron Populations for Non-linear High-Fluence X-ray Absorption Near-Edge Spectra
Robin Y. Engel, Markus Scholz, Jan O. Schunck +1
Absorbing a focused, femtosecond X-ray pulse from a Free-Electron Laser (FEL) can lead to extreme electronic excitations in solids. This excitation drives changes of the electronic…
Electron Dynamics at High-Energy Densities in Nickel from Non-linear Resonant X-ray Absorption Spectra
Robin Y. Engel, Oliver Alexander, Kaan Atak +40
The pulse intensity from X-ray free-electron lasers (FELs) can create extreme excitation densities in solids, entering the regime of non-linear X-ray-matter interactions. We show L…
Photon shot-noise limited transient absorption soft X-ray spectroscopy at the European XFEL
Loïc Le Guyader, Andrea Eschenlohr, Martin Beye +61
Femtosecond transient soft X-ray Absorption Spectroscopy (XAS) is a very promising technique that can be employed at X-ray Free Electron Lasers (FELs) to investigate out-of-equilib…
The interplay of local electron correlations and ultrafast spin dynamics in fcc Ni
Tobias Lojewski, Mohamed F. Elhanoty, Loïc Le Guyader +48
The complex electronic structure of metallic ferromagnets is determined by a balance between exchange interaction, electron hopping leading to band formation, and local Coulomb rep…
Filaments and voids in planar central configurations
Manuel R. Izquierdo
We have numerically computed planar central configurations of bodies of equal masses. A classification of central configurations is proposed based on the numerical value o…
Ultrafast molecular orbital tomography of a pentacene thin film using time-resolved momentum microscopy at a free-electron laser
K. Baumgärtner, M. Reuner, C. Metzger +19
We use time-resolved momentum microscopy at a free-electron laser (FEL) and extend orbital tomography into the time domain to image the electronic wave functions of excited molecul…
Charge order and suppression of superconductivity in HgBa2CuO4 at high pressures
Manuel Izquierdo, Daniele C. Freitas, Dorothée Colson +9
New insight into the superconducting properties of HgBa2CuO4 (Hg-1201) cuprates is provided by combined measurements of the electrical resistivity and single crystal X-ray diffract…
Correlation-driven charge and spin fluctuations in LaCoO
M. Karolak, M. Izquierdo, S. L. Molodtsov +1
The spin transition in LaCoO has been investigated within the density-functional theory + dynamical mean-field theory formalism using continuous time quantum Monte Carlo. Calcu…
Curie temperature enhancement of electron doped SrFeMoO perovskites studied by photoemission spectroscopy
J. Navarro, J. Fontcuberta, M. Izquierdo +2
We report here on the electronic structure of electron-doped half-metallic ferromagnetic perovskites such SrLaFeMoO (=0-0.6) as obtained from high-resolved valen…