Regensburg 2019 – wissenschaftliches Programm

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TT: Fachverband Tiefe Temperaturen

TT 4: Nonequilibrium Quantum Many-Body Systems 1 (joint session TT/DY)

TT 4.2: Vortrag

Montag, 1. April 2019, 09:45–10:00, H22

Ion Impact induced Doublon Creation in Strongly Correlated Finite Hubbard Systems — •Maximilian Rodriguez Rasmussen, Karsten Balzer, Niclas Schlünzen, Jan-Philip Joost, and Michael Bonitz — CAU Kiel, Germany

Under certain conditions strongly correlated fermions in lattice systems are known to form doublons - quasi-particles consisting of two electrons on the same site. Due to the interesting resulting electronic properties doublon formation processes have been the subject of various studies. Here a new mechanism of doublon production due the impact of energetic ions is presented. The processes leading to doublon creation are described and verified by numerical results [1, 2] obtained by exact diagonalization for small systems and non-equilibrium Green functions approach [3] for larger systems.
K. Balzer, M.R. Rasmussen, N. Schlünzen, J.-P. Joost, M. Bonitz, submitted to Phys. Rev. Lett., arXiv:1801.05267
M. Bonitz, K. Balzer, N. Schlünzen, M.R. Rasmussen, J.-P. Joost, Phys. Stat. Sol. (b) (2018), arXiv:1808.07868
K. Balzer and M. Bonitz, "Nonequilibrium Green’s Functions Approach to Inhomogeneous Systems", Springer 2013