Journal Article

We explore the sensitivity of collider experiments to a broad class of GeV-scale dark vector models of new physics via production in proton and neutron bremsstrahlung and initial state radiation. This is achieved using a new physically motivated model for timelike vector form factors with generic charges for both protons and neutrons, which is fit to a variety of timelike and spacelike data with quantified uncertainties. [...]

The study of non-local operators in gauge theory and holography, such as line-operators or interfaces, has attracted significant attention. Two-dimensional symmetric product orbifolds are close cousins of higher-dimensional gauge theory. [...]

Being a noble metal, silver is known for its chemical inertness. Molecular nitrogen, due to its extremely strong covalent triple bond, is also typically considered unreactive. [...]

The dimensionality of a layered material, i.e. the number of 2D layers bound together, is a structural property underpinning the functional properties of the material. [...]

Packing of soft spheres, such as micelles, polymer-grafted particles, and microgels, enables the creation of diverse functional materials. Despite the importance of achieving precise structural control, understanding the kinetics of non-equilibrium packing in a large-scale deposition process remains challenging. [...]

Halogen bonding enables the mechanochemical ball-milling isomerization of an otherwise persistent cis-coordinated metal complex into the corresponding trans-isomer. The importance of halogen bonding for enabling the cis→trans isomerization of the metal centre is evidenced by real-time in situ synchrotron powder X-ray diffraction monitoring of the ball-milling experiments that showed the transient appearance of a cis-geometry metal-organic halogen-bonded (MOXB) cocrystal, which is rapidly replaced by the corresponding trans-geometry one, with any excess, non-halogen-bonded cis-geometry complex being retained throughout the milling experiment. [...]

Neodymium-based permanent magnets are fundamental to modern technologies, underpinning high-performance applications in electronics, renewable energy, and advanced medical systems. Among emerging neodymium compounds, neodymium nitride (NdN) has attracted significant attention due to its unique electronic structure, where strongly localized 4f orbitals and strong spin–orbit coupling are anticipated to drive exceptional magnetic behavior. [...]

This work presents a systematic and detailed investigation of the structural, electronic, and electrochemical properties of Ni–N thin films grown using a reactive magnetron sputtering at partial nitrogen flow (RN2) of 0, 15, 50, 75, and 100%. Below RN2 = 50%, the phase formed is metallic Ni with some N atoms occupying interstitial sites. [...]

The atomic lattice plays a critical role in the emergence of high-𝑇𝑐 superconductivity in cuprates. While the dynamics associated with electron-lattice coupling typically unfold on picosecond-to-femtosecond timescales, we present an x-ray photon correlation spectroscopy investigation on an optimally doped La-based cuprate that reveals a strong response of kilosecond-scale lattice relaxation dynamics to the superconducting state. [...]

The photodynamics of 1- and 2-iodopropane (1 and 2-IP) were studied in a time-resolved scheme incorporating ultraviolet (UV) excitation and extreme ultraviolet (XUV) probing, which initiates photoionization selectively from the I 4d core orbital. UV absorption in the A-band of both isomers leads to prompt C–I bond fission, with significant disposal of internal energy into the propyl radical product. [...]