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Showing 1–2 of 2 results
Advanced filters: Author: Martin Wiesenmayer Clear advanced filters
  • Understanding the origin of spin filtering in metal/organic interfaces is important for the control of spin injection in organic semiconductors. A time-resolved photoemission experiment shows that spin filtering can be explained by the trapping of electrons in spin-dependent potentials at the interface.

    • Sabine Steil
    • Nicolas Großmann
    • Martin Aeschlimann
    Research
    Nature Physics
    Volume: 9, P: 242-247
  • Angle-resolved photoemission spectroscopy (ARPES) is widely used to study the electronic structure of a wide range of correlated materials. Time-resolved ARPES allows the study of the response of such electronic features on ultrafast timescales; this paper now adds an exciting new dimension by using high photon energies that allow the study of ultrafast dynamics at high momenta, where often the most interesting fundamental phenomena occur. The technique is applied to the charge density wave material 1T-TiSe2 and it is shown with stroboscopic imaging of the electronic band structure at high momentum that atomic-scale periodic long-range order collapses on a surprisingly short timescale of 20 femtoseconds.

    • Timm Rohwer
    • Stefan Hellmann
    • Michael Bauer
    Research
    Nature
    Volume: 471, P: 490-493