Ultrafast Correlated Electron Dynamics in Finite Graphene Nanostructures
ORAL
Abstract
Finite graphene nanoribbon (GNR) heterostructures host intriguing topological in-gap states [1]. These states may be localized either at the bulk edges or at the ends of the structure. In a previous work we showed that correlation effects play a key role in these systems, resulting in increased magnetic moments at the ribbon edges accompanied by a significant energy renormalization of the topological end states, even in the presence of a metallic substrate [2].
Here, we present new results on the ultrafast electronic response of these systems following an optical laser excitation. The nanostructures are described in the PPP model taking into account long-range Coulomb interactions. The correlated electron dynamics is treated within the GW approximation utilizing the newly developed G1-G2 scheme [3,4].
[1] T. Cao et al., Phys. Rev. Lett., 119 (2017) 076401
[2] J.-P. Joost, A.-P. Jauho, M. Bonitz, Nano Letters, 19 (2019) 9045-9050
[3] N. Schlünzen, J.-P. Joost, M. Bonitz, Phys. Rev. Lett., 124 (2020) 076601
[4] J.-P. Joost, N. Schlünzen, M. Bonitz, Phys. Rev. B, 101 (2020) 245101
Here, we present new results on the ultrafast electronic response of these systems following an optical laser excitation. The nanostructures are described in the PPP model taking into account long-range Coulomb interactions. The correlated electron dynamics is treated within the GW approximation utilizing the newly developed G1-G2 scheme [3,4].
[1] T. Cao et al., Phys. Rev. Lett., 119 (2017) 076401
[2] J.-P. Joost, A.-P. Jauho, M. Bonitz, Nano Letters, 19 (2019) 9045-9050
[3] N. Schlünzen, J.-P. Joost, M. Bonitz, Phys. Rev. Lett., 124 (2020) 076601
[4] J.-P. Joost, N. Schlünzen, M. Bonitz, Phys. Rev. B, 101 (2020) 245101
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Presenters
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Jan-Philip Joost
- ITAP, University of Kiel
- University of Kiel
- Institute of Theoretical Physics and Astrophysics, Kiel University, Germany
- Univ Kiel
- CAU Kiel, Germany