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Spatial extent of the excited exciton states in WS2 monolayers from diamagnetic shifts

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Zipfel, Jonas ; Holler, Johannes ; Mitioglu, Anatolie A. ; Ballottin, Mariana V. ; Nagler, Philipp ; Stier, Andreas V. ; Taniguchi, Takashi ; Watanabe, Kenji ; Crooker, Scott A. ; Christianen, Peter C. M. ; Korn, Tobias ; Chernikov, Alexey
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Date of publication of this fulltext: 18 Jul 2019 11:59


We experimentally study the radii of excitons in hBN-encapsulated WS(2 )monolayers by means of magneto-optical reflectance spectroscopy at cryogenic temperatures in magnetic fields up to 29 T. We observe field-induced energy shifts of the exciton ground and excited states due to valley Zeeman and diamagnetic effects. We find the g factor of the first excited state of -4.2 +/- 0.1 to be ...


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