Author(s): Shalini Badola, Adlen Smiri, Thomas Pelini, Aditi Moghe, Tristan Riccardi, Amit Pawbake, Kenji Watanabe, Takashi Taniguchi, Iann C. Gerber, and Clément Faugeras Excitons in two-dimensional semiconductors are directly exposed to the environment and are sensitive to the dielectric properties of their surrounding. Here, we show that the Rydberg series of excited states of excitons in a monolayer ${\mathrm{WSe}}_{2}$ encapsulated in hexagonal boron nitride (hBN… [Phys. Rev. Lett. 137, 036903] Published Fri Jul 17, 2026