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P: Fachverband Plasmaphysik

P 16: Poster Session 3

P 16.26: Poster

Mittwoch, 11. März 2020, 16:30–18:30, Empore Lichthof

Dynamical and static structure factor of non-ideal ions in quantum plasmas — Zhandos Moldabekov^1,2, •Hanno Kählert², Tobias Dornheim^3,2, and Michael Bonitz² — ¹Institute for Experimental and Theoretical Physics, Al-Farabi Kazakh National University, Almaty, Kazakhstan — ²ITAP, Christian-Albrechts-Universität zu Kiel — ³Center for Advanced Systems Understanding (CASUS), Görlitz

Advances on dense plasma diagnostics [1] should make it possible to probe ion acoustic modes at warm dense matter and dense plasma conditions. This motivates a theoretical investigation of the ionic dynamical structure factor (DSF). We have computed the DSF employing a linearly screened ion potential in molecular dynamics simulations. Electronic correlations were taken into account using local-field corrections in the STLS approximation [2,3]. The range of plasma parameters at which the STLS approximation is applicable for the description of the screening has been defined in Ref. [4]. The impact of electronic correlations on the ionic DSF is elucidated by comparing the STLS based results to MD data with a screened ion potential in the random phase approximation. Finally, the applicability of the Yukawa model for the description of the ionic DSF in dense plasmas is discussed [5].

[1] E. E. McBride et al., Rev. Sci. Instrum. 89, 10F104 (2018).

[2] K. S. Singwi et al., Phys. Rev. 176, 589 (1968).

[3] S. Tanaka and S. Ichimaru, J. Phys. Soc. Jpn. 55, 2278 (1986).

[4] Zh. Moldabekov et al., Phys. Rev. E 98, 023207 (2018).

[5] Zh. Moldabekov et al., Phys. Rev. E 99, 053203 (2019).