Seminarium Fizyki Ciała Stałego

Whereas Raman scattering spectroscopy has been widely applied to study the monolayers (ML) of transition metal dichalcogenides (TMD) no electronic excitations in these emerging 2D semiconductors have been observed with this technique. Here, we report the inelastic light scattering magneto-spectroscopy under quasi-resonant conditions on lightly doped WSe2 and MoSe2 monolayers and reveal a series of inter Landau level excitations. Data analysis allows us to determine the single particle effective masses in the systems studied. Those relevant band structure parameters are of primary importance for modeling the advanced ML-TMD properties, though they are barely estimated from other, more conventional measurements.