Ulrike Boesenberg

Generation of high-fluence and high-intensity hard x-ray attosecond pulses at European XFEL

Ichiro Inoue, Ulrike Boesenberg, Rustam Rysov, Takahiro Sato et autres

By combining hard x-ray attosecond pulses from the European XFEL with total-reflection focusing x-ray optics, we generated nanofocused hard x-ray attosecond pulses with intensities and fluences comparable to the highest values attained in the hard x-ray regime. A peak intensity on the …

Generation of high-fluence and high-intensity hard x-ray attosecond pulses at European XFEL

Ichiro Inoue, Ulrike Boesenberg, Rustam Rysov, Takahiro Sato et autres

By combining hard x-ray attosecond pulses from the European XFEL with total-reflection focusing x-ray optics, we generated nanofocused hard x-ray attosecond pulses with intensities and fluences comparable to the highest values attained in the hard x-ray regime. A peak intensity on the …

de, us, jp (code pays fourni par la source)

Electron pressure drives THz phonons in metal–metal superlattices

Jan‐Etienne Pudell, Maximilian Mattern, Marc Herzog, A. von Reppert et autres

Ultrafast control of lattice motion in metals is a central challenge for high-frequency strain engineering and spintronic applications. Coherent strain control at terahertz (THz) frequencies in metals has remained elusive because free electrons are expected to delocalize energy beyond the optical penetration …

de, se, fr (code pays fourni par la source)

Spatiotemporal migration of antiferromagnetic domain walls in Sr 2 IrO 4

Ian Robinson, David J. Yang, Ross Harder, Dina Sheyfer et autres

By laser pump-probe time-resolved coherent magnetic x-ray diffraction imaging, we have measured the migration velocity of antiferromagnetic domain walls in the Mott insulator Sr 2 IrO 4 at 100 K. Coherent diffraction patterns, recorded at the 106 pure-magnetic Bragg peak, showed fringes, …

us, gb, cn, rs, de (code pays fourni par la source)

Electron pressure drives THz phonons in metal--metal superlattices

Jan‐Etienne Pudell, Maximilian Mattern, Marc Herzog, A. von Reppert et autres

Analysis notebooks and Simulation Code for: "Electron pressure drives THz phonons in metal--metal superlattices"

de, fr (code pays fourni par la source)

Electron pressure drives THz phonons in metal--metal superlattices

Jan‐Etienne Pudell, Maximilian Mattern, Marc Herzog, A. von Reppert et autres

Analysis notebooks and Simulation Code for: "Electron pressure drives THz phonons in metal--metal superlattices"

de, fr (code pays fourni par la source)

Ultrafast heat transfer in single palladium nanocrystals seen with an X-ray free-electron laser

James J. Wrigley, Jack P. Griffiths, Longlong Wu, Ana F. Suzana et autres

Abstract We report transient highly strained structural states in individual palladium (Pd) nanocrystals, electronically heated using an optical laser, which precede their uniform thermal expansion. Using an X-ray free-electron laser probe, the evolution of individual 111 Bragg peaks is measured as a …

us, de, gb (code pays fourni par la source)

Depletion-induced interactions modulate nanoscale protein diffusion in polymeric crowder solutions

Michelle Dargasz, Nimmi Das Anthuparambil, Sebastian Retzbach, Anita Girelli et autres

Macromolecular crowding plays a crucial role in modulating protein dynamics in cellular and in vitro environments. Polymeric crowders such as dextran and Ficoll are known to induce entropic forces, including depletion interactions, that promote structural organization, yet their nanoscale consequences for protein …

de (code pays fourni par la source)

Coherent X-rays reveal anomalous molecular diffusion and cage effects in crowded protein solutions

Anita Girelli, Maddalena Bin, Mariia Filianina, Michelle Dargasz et autres

Abstract Understanding protein motion within the cell is crucial for predicting reaction rates and macromolecular transport in the cytoplasm. A key question is how crowded environments affect protein dynamics through hydrodynamic and direct interactions at molecular length scales. Using megahertz X-ray Photon …

se, de, fr (code pays fourni par la source)

Single-shot sorting of Mössbauer time-domain data at X-ray free-electron lasers

Miriam Gerharz, Willi Hippler, Berit Marx-Glowna, Sakshath Sadashivaiah et autres

Mössbauer spectroscopy is widely used to study structure and dynamics of matter with remarkably high energy resolution, provided by the narrow nuclear resonance line widths. However, the narrow width implies low count rates, such that experiments commonly average over extended measurement times …

High-quality ultra-fast total scattering and pair distribution function data using an X-ray free-electron laser

Adam F. Sapnik, Philip A. Chater, Dean S. Keeble, John S. O. Evans et autres

High-quality total scattering data, a key tool for understanding atomic-scale structure in disordered materials, require stable instrumentation and access to high momentum transfers. This is now routine at dedicated synchrotron instrumentation using high-energy X-ray beams, but it is very challenging to measure …

dk, gb, it, de, hu, rs (code pays fourni par la source)

Ultrafast X-ray sonography reveals the spatial heterogeneity of the laser-induced magneto-structural phase transition in FeRh

Maximilian Mattern, Angel Rodríguez-Fernández, Roman Shayduk, Jon Ander Arregi et autres

Phase transitions are governed by both intrinsic and extrinsic heterogeneities, yet capturing their spatio-temporal dynamics remains a challenge. While ultrafast techniques track phase changes on femtosecond timescales, the spatial complexity and stochastic nature of the processes often remain hidden. Here, we present …