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Jens Uhlig. Portrait.

Jens Uhlig

Senior lecturer

Jens Uhlig. Portrait.

Spin-state studies with XES and RIXS: From static to ultrafast

Author

  • Gyoergy Vanko
  • Amelie Bordage
  • Pieter Glatzel
  • Erik Gallo
  • Mauro Rovezzi
  • Wojciech Gawelda
  • Andreas Galler
  • Christian Bressler
  • Gilles Doumy
  • Anne Marie March
  • Elliot P. Kanter
  • Linda Young
  • Stephen H. Southworth
  • Sophie Canton
  • Jens Uhlig
  • Grigory Smolentsev
  • Villy Sundström
  • Kristoffer Haldrup
  • Tim Brandt van Driel
  • Martin M. Nielsen
  • Kasper S. Kjaer
  • Henrik T. Lemke
Show all

Summary, in English

We report on extending hard X-ray emission spectroscopy (XES) along with resonant inelastic X-ray scattering (RIXS) to study ultrafast phenomena in a pump-probe scheme at MHz repetition rates. The investigated systems include low-spin (LS) Fe-II complex compounds, where optical pulses induce a spin-state transition to their (sub)nanosecond-lived high-spin (HS) state. Time-resolved XES clearly reflects the spin-state variations with very high signal-to-noise ratio, in agreement with HS-LS difference spectra measured at thermal spin crossover, and reference HS-LS systems in static experiments, next to multiplet calculations. The 1s2p RIXS, measured at the Fe Is pre-edge region, shows variations after laser excitation, which are consistent with the formation of the HS state. Our results demonstrate that X-ray spectroscopy experiments with overall rather weak signals, such as RIXS, can now be reliably exploited to study chemical and physical transformations on ultrafast time scales. (C) 2012 Elsevier B.V. All rights reserved.

Department/s

  • Chemical Physics
  • MAX IV Laboratory

Publishing year

2013

Language

English

Pages

166-171

Publication/Series

Journal of Electron Spectroscopy and Related Phenomena

Volume

188

Document type

Journal article

Publisher

Elsevier

Topic

  • Natural Sciences
  • Physical Sciences
  • Atom and Molecular Physics and Optics

Keywords

  • Molecular switching
  • Time-resolved spectroscopy
  • X-ray spectroscopy
  • Spin transition
  • Photoinduced transition
  • Ultrafast phenomena
  • Pump-probe experiments

Status

Published

ISBN/ISSN/Other

  • ISSN: 0368-2048