Dresden 2017 – wissenschaftliches Programm

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MA: Fachverband Magnetismus

MA 31: Ultrafast Electron and Spin Dynamics

MA 31.4: Poster

Dienstag, 21. März 2017, 18:30–20:30, P2-EG

Ab initio approach to the ion stopping power at the plasma-solid interface — Karsten Balzer, •Niclas Schlünzen, Jan-Philip Joost, Lasse Wulff, and Michael Bonitz — CAU Kiel, Germany

The energy loss of ions in solids is of key relevance for many applications of plasmas, ranging from plasma technology to fusion. Standard approaches are based on density functional theory or SRIM simulations, however, the applicability range and accuracy of these results are difficult to assess, in particular, for low energies. Here, we present an independent approach that is based on ab initio nonequilibrium Green functions theory, e.g. [1,2] that allows to incorporate electronic correlations effects of the solid. As first application of this method to low-temperature plasmas, we concentrate on proton and alpha-particle stopping in a graphene layer and similar finite honeycomb lattice systems. In addition to the stopping power we present time-dependent results for the local electron density, the spectral function and the photoemission spectrum [3] that is accessible in optical, UV or x-ray diagnostics [4].
[1] M. Bonitz, Quantum Kinetic Theory, 2nd edition (Springer, 2016)
[2] K. Balzer and M. Bonitz, Lect. Notes Phys. 867 (2013)
[3] M. Eckstein and M. Kollar, Phys. Rev. B 78, 245113 (2008)
[4] K. Balzer, N. Schlünzen, and M. Bonitz, Phys. Rev. B,
accepted for publication, arXiv:1602.06928 (2016)