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Imaging electronic quantum motion with light

Surprisingly, scattering patterns obtained by X-ray time-resolved imaging from an electronic wavepacket encode spatial and temporal correlations that deviate substantially from the common notion of the instantaneous electronic density as the key quantity being probed.
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Band gap engineering in penta-graphene by substitutional doping: first-principles calculations

The findings, which are robust against the use of different exchange-correlation functionals, indicate the possibility of tuning the bandgap of the material to make it suitable for optoelectronic and photovoltaic applications.
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High-harmonic generation from spin-polarised defects in solids

The generation of high-order harmonics in gases enabled to probe the attosecond electron dynamics in atoms and molecules with unprecedented resolution. Extending these techniques to solids, which…
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Light-induced valleytronics in pristine graphene

Electrons in two-dimensional hexagonal materials have valley degree of freedom, which can be used to encode and process quantum information. The valley-selective excitations, governed by the…
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Theory of time-resolved nonresonant x-ray scattering for imaging ultrafast coherent electron motion

Future ultrafast x-ray light sources might image ultrafast coherent electron motion in real-space and in real-time. For a rigorous understanding of such an imaging experiment, we extend the theory of…
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Time delay in the recoiling valence photoemission of ar endohedrally confined in C60.

The effects of confinement and electron correlations on the relative time delay between the 3s and 3p photoemissions of Ar confined endohedrally in C60 are investigated using the time-dependent local density approximation and a recoil-type interaction model mediated by the confinement is found to best describe the phenomenon.
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Angular asymmetry and attosecond time delay from the giant plasmon resonance in C-60 photoionization

This combined experimental and theoretical study demonstrates that the surface plasmon resonance in C-60 alters the valence photoemission quantum phase, resulting in strong effects in the…
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Ab initio relativistic many-body calculation of hyperfine splittings of 113Cd+

This work presents accurate ab initio determination of the hyperfine splitting for the ground state and a few low-lying excited states of 113 Cd + ; important candidate for the frequency standard in…
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Instrumentation and methods: general discussion.

Jochen Küpper opened the discussion of the paper by John Spence by commenting: Dear Speakers, following the discussions of relevant time-scales in your papers, I would like to hear your opinion on what are the relevant timescales to understand nature.
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X-ray imaging of chemically active valence electrons during a pericyclic reaction

This work demonstrates an effective and robust method, which emphasizes the information encoded in weakly scattered photons, to image chemically active valence electron densities and provides experimental access to the long-standing problem of synchronous versus asynchronous bond formation and breaking during pericyclic reactions.
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