Bulletin of the American Physical Society
APS March Meeting 2022
Volume 67, Number 3
Monday–Friday, March 14–18, 2022; Chicago
Session D48: Quantum Many-Body Systems and Methods I
3:00 PM–5:48 PM,
Monday, March 14, 2022
Room: McCormick Place W-471A
Sponsoring
Unit:
DCOMP
Chair: Talat Rahman, University of Central Florida
Abstract: D48.00014 : Electronic excitations in correlated finite 2D materials generated by ion impact
5:36 PM–5:48 PM
Presenter:
Michael Bonitz
(Univ Kiel)
Authors:
Michael Bonitz
(Univ Kiel)
Niclas Schluenzen
(Kiel University, Germany)
Jan-Philip Joost
(Kiel University)
Lotte Amelie Borkowski
(Univ Kiel)
Karsten Balzer
(Kiel University)
Hannes Ohldag
(Kiel University)
nonequilibrium Green functions (NEGF) approach. While NEGF can handle any dimensionality and geometry, however, they are computationally costly (cubic scaling with the simulation duration T). Recently, we could achieve linear scaling with T by introducing the G1-G2 scheme [2]. It has allowed us to perform long simulations and, in addition, to include higher order electronic selfenergies accounting for strong coupling and dynamical screening. We use this to explore the doublon generation by multiple ion impacts [3] and the charge transfer between target and projectile [4].
[1] K. Balzer et al., Phys. Rev. Lett. 121, 267602 (2018)
[2] N. Schluenzen et al., Phys. Rev. Lett. 124, 076601 (2020)
[3] L. Borkowski et al., phys. stat. sol. (b) (2021), arXiv:2110.06644
[4] K. Balzer and M. Bonitz, Contrib. Plasma Phys. e202100041 (2021)
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