Towards atomic diffraction through single-layer graphene

  • MP Department Seminar
  • Date: Feb 23, 2024
  • Time: 09:30 AM c.t. - 10:30 AM (Local Time Germany)
  • Speaker: Christian Brand
  • German Aerospace Center, Institute of Quantum Technologies, see
  • Location: Haber Villa
  • Room: Seminar Room
  • Host: Department of Molecular Physics
  • Contact:
Towards atomic diffraction through single-layer graphene

Using hydrogen atoms with a velocity of up to 120 000 m/s, we predict a high probability of coherently diffracting atoms through the natural lattice of the crystalline gratings. Nevertheless, the minimum distance between the matter wave and the grating is on the picometer scale, leading to significant couplings. As this interplay is encoded in the matter wave, it brings direct and dose-independent imaging of the interaction within reach. While investigations below the damage threshold ensure virtually infinite interrogation times, studies above the damage threshold give insights into dynamical processes in real-time. Such information is important to understand technologically-relevant atom-induced processes in 2D material, such as milling, defect-formation, and excitations.

[1] C. Brand, M. Debiossac, T. Susi, F. Aguillon, J. Kotakoski, P. Roncin, and M. Arndt, New J. Phys. 21, 033004 (2019).

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