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Exciton Diffusion and Halo Effects in Monolayer Semiconductors

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Kulig, Marvin ; Zipfel, Jonas ; Nagler, Philipp ; Blanter, Sofia ; Schüller, Christian ; Korn, Tobias ; Paradiso, Nicola ; Glazov, Mikhail M. ; Chernikov, Alexey
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Date of publication of this fulltext: 30 Jul 2019 13:37


We directly monitor exciton propagation in freestanding and SiO2-supported WS2 monolayers through spatially and time-resolved microphotoluminescence under ambient conditions. We find a highly nonlinear behavior with characteristic, qualitative changes in the spatial profiles of the exciton emission and an effective diffusion coefficient increasing from 0.3 to more than 30 cm(2)/s, depending on ...


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