Abstract Nitrogen dioxide (NO 2), a hazardous gas with acidic nature, is continuously being
liberated in the atmosphere due to human activity. The NO 2 sensors based on traditional …

Coulomb drag is a transport phenomenon whereby long-range Coulomb interaction
between charge carriers in two closely spaced but electrically isolated conductors induces a …

Abstract Two-dimensional (2D) atomic crystals, such as graphene and transition-metal
dichalcogenides, have emerged as a new class of materials with remarkable physical …

Point defects in semiconductors can trap free charge carriers and localize excitons. The
interaction between these defects and charge carriers becomes stronger at reduced …

Monolayer group-VI transition metal dichalcogenides have recently emerged as
semiconducting alternatives to graphene in which the true two-dimensionality is expected to …

We present a microscopic theory of neutral excitons and charged excitons (trions) in
monolayers of transition metal dichalcogenides, including molybdenum disulfide. Our theory …

In the monolayer limit, transition metal dichalcogenides become direct-bandgap, light-
emitting semiconductors. The quantum yield of light emission is low and extremely sensitive …

We present optical spectroscopy (photoluminescence and reflectance) studies of thin layers
of the transition metal dichalcogenide WSe2, with thickness ranging from mono-to tetra-layer …

The fine structure of excitons is studied by magnetophotoluminescence spectroscopy of
single self-assembled In (Ga) As/(Al) GaAs quantum dots. Both strength and orientation of …

Monolayer (1L) semiconducting transition metal dichacogenides (TMDs) possess
remarkable physical and optical properties, promising for a wide range of applications from …