OpenAccess

The mechanical behavior of carburized Ti-stabilized austenitic stainless steel was investigated by combining in situ tensile tests, high-energy X-ray diffraction (HEXRD), and finite element modeling. Carburizing at 500 °C for 1000 h and 3000 h generated strong through-thickness gradients in carbon content, microhardness, and residual stresses, leading to marked local variations in mechanical response. [...]

The structure and dynamics of four different colloidal systems are investigated usingcoherent X-ray scattering methods. The static structure of the samples is studied us-ing Small Angle X-ray Scattering (SAXS), while the dynamics are probed using X-rayPhoton Correlation Spectroscopy (XPCS). [...]

Operando studies of solid-state batteries (SSBs) must capturedevice-relevant stack pressure and temperature, since uncontrolled conditionscan cause relaxation artifacts and lead to false mechanistic interpretations. Toaddress this, we developed an operando framework for X-ray diffraction(XRD) and X-ray spectroscopy (XAS) with precisely controlled dynamicpressure and temperature, deployable across three platforms: (i) scanningmicrobeam transmission XRD for spatiotemporal mapping of reaction fronts,state-of-charge gradients, and stress localizations; (ii) coupled transmissionXRD−XAS for simultaneous tracking of structural and redox evolution; and(iii) laboratory XRD for real-time monitoring of phase transformationsduring operation. [...]

Volatiles can form novel compounds and exhibit extraordinary properties under high pressure. The recently developed nanostructured diamond capsules (NDCs) enable the preservation of otherwise typically unquenchable high-pressure volatiles for fundamental research and practical applications in ambient environments. [...]

This thesis investigates loop integrands of correlation functions of scalar half-BPS operators in four-dimensional $\mathcal{N}=4$ supersymmetric Yang–Mills (SYM) theory. $\mathcal{N}=4$ SYM provides a central “theoretical laboratory” due to its high degree of symmetry, its role in the AdS/CFT correspondence, and the emergence of integrability in the planar limit.First, we study planar higher-point generating functions, which combine infinitely many fixed-charge correlators into unified expressions using ten-dimensional coordinates that merge spacetime and R-symmetry variables. [...]

Die Hochdruck-Hochtemperatur-Synthese in laserbeheizten Diamantstempelzellen ermöglicht die direkte Stabilisierung polymerer und oligomerer Stickstoffeinheiten, die aufgrund der Stabilität des N2 Moleküls unter Umgebungsbedingungen oft nicht zugänglich sind. Hier berichten wir über die Reaktion von Antimon bei höheren Drücken mit molekularem Stickstoff, die zur Entdeckung zweier unterschiedlicher binärer Nitride führte. [...]

Hybrid organic-inorganic perovskites (HOIPs) have garnered significant attention for their crystalline properties, yet recent findings reveal that they can also form liquid and glassy phases, offering an alternative platform for understanding non-crystalline materials. In this study, we present a detailed investigation into the structural dynamics of the melting and glass formation process of a two-dimensional (2D) HOIP, (S−(−)−1-(1−naphthyl)ethylammonium)2PbBr4 [...]

The discovery of high-performance multicomponent alloys is constrained by the vastness of composition space and the scarcity of experimentally validated data. We develop VIBANN, a variational information bottleneck-augmented attention-based neural network framework, for uncertainty-aware inverse design of exceptionally hard bulk multicomponent metallic glasses [...]

Charge density wave (CDW) phases are unconventional quantum states that often arise in low-dimensional metallic systems and are themselves found alongside other exotic phenomena. Finding such states in porous materials is exceedingly rare [...]

Fluorine incorporation into mixed-anion inorganic solids is often limited by the thermodynamic stability of conventional solid fluorination reagents. LiF, the most used fluorine source in solid-state and mechanochemical synthesis, exhibits strong Li─F bonding that can hinder fluorine transfer and lead to residual LiF and coupled Li/F off-stoichiometry [...]