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Berry Curvature Signatures in Chiroptical Excitonic Transitions
Samuel Beaulieu, Shuo Dong, Viktor Christiansson +10
The topology of the electronic band structure of solids can be described by its Berry curvature distribution across the Brillouin zone. We theoretically introduce and experimentall…
Probing magnetic orbitals and Berry curvature with circular dichroism in resonant inelastic X-ray scattering
Michael Schüler, Thorsten Schmitt, Philipp Werner
Resonant inelastic X-ray scattering (RIXS) can probe localized excitations at selected atoms in materials, including particle-hole transitions between the valence and conduction ba…
Field-induced ultrafast modulation of Rashba coupling at room temperature in ferroelectric -GeTe(111)
Geoffroy Kremer, Julian Maklar, Laurent Nicolaï +11
Rashba materials have appeared as an ideal playground for spin-to-charge conversion in prototype spintronics devices. Among them, -GeTe(111) is a non-centrosymmetric ferroelectr…
Ultrafast Dynamics of the Surface Photovoltage in Potassium Doped Black Phosphorus
G. Kremer, M. Rumo, C. Yue +6
Black phosphorus is a quasi-two-dimensional layered semiconductor with a narrow direct band gap of 0.3 eV. A giant surface Stark effect can be produced by the potassium doping of b…
How Circular Dichroism in time- and angle-resolved photoemission can be used to spectroscopically detect transient topological states in graphene
Michael Schüler, Umberto De Giovannini, Hannes Hübener +4
Pumping graphene with circularly polarized light is the archetype of light-tailoring topological bands. Realizing the induced Floquet-Chern insulator state and tracing clear experi…