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Absorption of light by excitons and trions in monolayers of metal dichalcogenide<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"><mml:mi>Mo</mml:mi><mml:msub><mml:mi mathvariant="normal">S</mml:mi><mml:mn>2</mml:mn></mml:msub></mml:math>: Experiments and theory
We measure the optical-absorption spectra and optical conductivities of excitons and trions in monolayers of metal dichalcogenide MoS${}_{2}$ and compare the results with theoretical models. Our results show that the Wannier-Mott model for excitons with modifications to account for small exciton radii and large exciton relative wave function spread in …