News
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Pre-print advertisement: "The role of non-equilibrium populations in dark exciton formation" In 2D semiconductors, following the excitation of bright excitons, many-particle scattering can lead to the formation of lower-energy dark excitonic states. Importantly, the initial population in these dark states may be in a non-equilibrium condition and subsequent scattering events are necessary for the thermalization of the excitonic distribution.
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New publication in Nature Physics: "Observation of Floquet states in graphene" Floquet engineering works. As the Kapitza pendulum finds new equilibria due to time-dependent shaking (check-out Youtube videos!), so can quantum materials.
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'News & Views' by Julien Madeo and Keshav Dani in Nature Physics on 'Floquet states in graphene revealed at last'. Time-resolved photoemission shows evidence of Floquet states in graphene, resolving a long-standing debate and unlocking engineering of quantum phases with light in semi-metals.
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Marcel @ Meet the Prof Interview with Marcel Reutzel about his research focus.
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Graphene in the Spotlight: Floquet States Featured on the Cover of Nature Physics Our study on Floquet states in graphene is now published in the July issue of Nature Physics
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New project on ultrafast dynamics in hybrid organic/2D heterostructures. We are excited to launch our new LOEWE Exploration 2025 project with Prof. G. Witte’s group, exploring how twisting organic crystals on 2D materials can control optoelectronic properties. These effects will be probed using time-resolved momentum microscopy.
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Hybrid excitons: Combining the best of two worlds? Researchers from Göttingen, Berlin, and Graz discovered a hybrid exciton at a 2D/organic interface that combines the properties of both materials through ultrafast energy transfer.