The Band Edge Excitons in 2HMoS2

Abstract The optical constantsof synthetic 2HMoS 2 have been determined over the range 0.05 to 3.75 eV. The absorption edge consists of two series of exciton bands due to direct allowed transitions. The Zeeman splitting and diamagnetic shift of these exciton lines are measured together with the effects of crystal confinement and temperature; the derived exciton parameters are different from those of molybdenite. Oscillatory magneto‐absorption occurs at the high energy side of each exciton series which gives a measure of the carrier masses.