Journal Article

Strong-field quantum electrodynamics offers a unique window into nonperturbative phenomena such as nonlinear Breit–Wheeler pair production, in which electron–positron pairs are created from the vacuum in the presence of intense electromagnetic fields. The LUXE experiment at DESY is designed to probe this regime using collisions between a high-intensity laser and the 16.5 GeV electron beam of the European XFEL. [...]

As device architectures in electronics, photonics, and quantum technologies reach atomic dimensions, precise and controllable material processing becomes essential. However, achieving atomic-layer precision in materials etching, even in silicon dioxide (SiO$_2$), remains a major challenge for next-generation nanofabrication. [...]

The optical and vibrational responses of Gd$_3$Ga$_5$O$_{12}$ (GGG) single crystals to 147 MeV Kr-ion irradiations were systematically investigated to clarify defect formation pathways and their influence on luminescence mechanisms. Absorption spectra measured at room temperature reveal a stepwise redshift of the fundamental edge and the progressive development of a broad sub-band-gap tail between 4.4 and 5.3 eV, indicating the accumulation of F- and F$^+$-type oxygen-vacancy centers and increasing structural disorder [...]

With x-ray absorption spectroscopy and x-ray magnetic circular dichroism, the element-specific electronic structure and the magnetic interactions of the double perovskite compounds PrCo$_{0.5}$⁢Ni$_{0.5}$⁢O$_3$ and LaCo$_{0.5}$⁢Ni$_{0.5}$⁢O$_3$ were studied. In both compounds, Co and Ni depart from their nominal valence state of +3, implying a charge transfer from Ni to Co. [...]

The dynamic strain aging (DSA) behavior of an extruded Mg–3Gd–1Zn (wt.%) alloy was investigatedunder compressive deformation at intermediate temperatures (150–250 ◦C) andstrain rates ranging from 5 × 10−5 to 10−3 s−1. The as-extruded alloy exhibited equiaxedgrains (~20 μm), with all alloying elements retained in solid solution and a weak basaltexture. [...]

Cavity dressing of molecular vibrational dynamics expands the role of characteristic vibrations as spectroscopic markers of underlying ultrafast dynamics. Interacting vibrational modes exhibit pronounced excited state delocalization due to the interaction with the cavity mode, which is reflected in the ultrafast dynamics [...]

Understanding the reaction kinetics at catalytically active sites is crucial for integrating catalytic two-dimensional (2D) materials into industrial processes. This study focuses on in situ observation of ligand exchange kinetics and solvent-assisted structural restacking transition in the 2D paddle wheel-based MOF [Cu2(dttc)2]n (DUT-134(Cu), dttc = dithieno[3,2-b:2′,3′-d]thiophene-2,6-dicarboxylate) [...]

Strain-induced modifications of the electronic structure in 𝑇 𝑑 -Mo0.91 W0.09 Te2 were studied using hard X-ray angle-resolved pho-toemission spectroscopy (HARPES). Partial substitution of Mo with W stabilizes the metastable low-temperature orthorhombic 𝑇 𝑑phase of MoTe2 . [...]