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Tensile strain induced brightening of momentum forbidden dark exciton in WS
Tamaghna Chowdhury, Sagnik Chatterjee, Dibyasankar Das +8
Transition-metal dichalcogenides (TMDs) host tightly bound quasi-particles called excitons. Based on spin and momentum selection rules, these excitons can be either optically brigh…
Polarized and narrow excitonic emission from graphene-capped monolayer WS through resonant phonon relaxation
Garima Gupta, Kausik Majumdar
The broadening and polarization of excitonic luminescence in monolayer TMDs largely suffer from inhomogeneity and temperature - an unresolved problem to date. In this work, through…
Harmonic to anharmonic tuning of moiré potential leading to unconventional Stark effect and giant dipolar repulsion in WS/WSe heterobilayer
Suman Chatterjee, Medha Dandu, Pushkar Dasika +6
Excitonic states trapped in harmonic moiré wells of twisted heterobilayers is an intriguing testbed. However, the moiré potential is primarily governed by the twist angle, and its…