Ion Impact Induced Ultrafast Electron Dynamics in Finite Graphene‐Type Hubbard Clusters (Phys. Status Solidi B 7/2019)

Abstract

The nonequilibrium Green's functions (NEGF) method has proven to be a powerful tool to describe quantum behavior for a variety of correlated many‐body systems out of equilibrium. The cover image shows results of NEGF calculations of the response of a correlated chain of electrons in a Hubbard lattice to the impact of charged particles. The ions produce a local increase of the double occupation at the impact point, that is spreading through the system. With each successive particle impact the double‐occupation level is significantly increased in time and gives rise to stable, delocalized doublons–bound electron pairs. For more details see article no. http://doi.wiley.com/10.1002/pssb.201800490 by Michael Bonitz et al. within the special section “Non‐Equilibrium Green's Functions”, guest‐edited by Gianluca Stefanucci, Andrea Marini, and Stefano Bellucci (cf. also the Preface, article no. http://doi.wiley.com/10.1002/pssb.201900335).