Parity violation in resonant inelastic soft x-ray scattering at entangled core holes

Johan Söderström, Anirudha Ghosh, Ludvig Kjellsson, Victor Ekholm, Takashi Tokushima, Conny Såthe, Nicolas Velasquez, Marc Simon, Olle Björneholm, Laurent Duda, Arnaldo Naves de Brito, Michael Odelius, Ji Cai Liu, Jian Wang, Victor Kimberg, Marcus Agåker, Jan Erik Rubensson, Faris Gel’mukhanov

Forskningsoutput: TidskriftsbidragArtikel i vetenskaplig tidskriftPeer review


Resonant inelastic x-ray scattering (RIXS) is a major method for investigation of electronic structure and dynamics, with applications ranging from basic atomic physics to materials science. In RIXS applied to inversion-symmetric systems, it has generally been accepted that strict parity selectivity applies in the sub–kilo–electron volt region. In contrast, we show that the parity selection rule is violated in the RIXS spectra of the free homonuclear diatomic O2 molecule. By analyzing the spectral dependence on scattering angle, we demonstrate that the violation is due to the phase difference in coherent scattering at the two atomic sites, in analogy with Young’s double-slit experiment. The result also implies that the interpretation of x-ray absorption spectra for inversion symmetric molecules in this energy range must be revised.

TidskriftScience Advances
StatusPublished - 2024

Ämnesklassifikation (UKÄ)

  • Atom- och molekylfysik och optik


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