Brighter, faster, stronger: ultrafast scattering of free molecules

A Odate, A Kirrander, PM Weber… - Advances in Physics …, 2023 - Taylor & Francis
Advances in FEL technologies have contributed remarkably to various scientific fields over
the past decade, and ultrafast molecular dynamics is no exception. The ability to probe …

[HTML][HTML] Perspectives on weak interactions in complex materials at different length scales

J Fiedler, K Berland, JW Borchert… - Physical Chemistry …, 2023 - pubs.rsc.org
Nanocomposite materials consist of nanometer-sized quantum objects such as atoms,
molecules, voids or nanoparticles embedded in a host material. These quantum objects can …

Ultrafast X-ray scattering reveals vibrational coherence following Rydberg excitation

B Stankus, H Yong, N Zotev, JM Ruddock… - Nature …, 2019 - nature.com
The coherence and dephasing of vibrational motions of molecules constitute an integral part
of chemical dynamics, influence material properties and underpin schemes to control …

[HTML][HTML] Observation of the molecular response to light upon photoexcitation

H Yong, N Zotev, JM Ruddock, B Stankus… - Nature …, 2020 - nature.com
When a molecule interacts with light, its electrons can absorb energy from the
electromagnetic field by rapidly rearranging their positions. This constitutes the first step of …

Ultrafast X-ray scattering offers a structural view of excited-state charge transfer

H Yong, X Xu, JM Ruddock, B Stankus… - Proceedings of the …, 2021 - National Acad Sciences
Intramolecular charge transfer and the associated changes in molecular structure in N, N′-
dimethylpiperazine are tracked using femtosecond gas-phase X-ray scattering. The …

The contribution of Compton ionization to ultrafast x-ray scattering

KM Ziems, M Simmermacher, S Gräfe… - The Journal of Chemical …, 2023 - pubs.aip.org
We investigate the role of Compton ionization in ultrafast non-resonant x-ray scattering using
a molecular model system, which includes the ionization continuum via an orthonormalized …

[HTML][HTML] Ultrafast x-ray and electron scattering of free molecules: A comparative evaluation

L Ma, H Yong, JD Geiser, A Moreno Carrascosa… - Structural …, 2020 - pubs.aip.org
Resolving gas phase molecular motions with simultaneous spatial and temporal resolution
is rapidly coming within the reach of x-ray Free Electron Lasers (XFELs) and Mega-electron …

Direct monitoring of conical intersection passage via electronic coherences in twisted x-ray diffraction

H Yong, JR Rouxel, D Keefer, S Mukamel - Physical Review Letters, 2022 - APS
Quantum coherences in electronic motions play a critical role in determining the pathways
and outcomes of virtually all photophysical and photochemical molecular processes …

[HTML][HTML] Towards high-resolution X-ray scattering as a probe of electron correlation

AM Carrascosa, JP Coe, M Simmermacher… - Physical Chemistry …, 2022 - pubs.rsc.org
X-ray scattering cross sections are calculated using a range of increasingly correlated
methods: Hartree–Fock (HF), complete active space self-consistent field (CASSCF), Monte …

Probing electronic fluxes via time-resolved x-ray scattering

G Hermann, V Pohl, G Dixit, JC Tremblay - Physical review letters, 2020 - APS
The current flux density is a vector field that can be used to describe theoretically how
electrons flow in a system out of equilibrium. In this work, we unequivocally demonstrate that …