6 papers · 1 filter
Excitons in moiré superlattices with disordered electrons
Junghwan Kim, Dinh Van Tuan, Hanan Dery
Moiré superlattices in transition metal dichalcogenides (TMDs) heterobilayers exhibit various correlated insulating states driven by long-range Coulomb interactions, and these sta…
Landau-level composition of bound exciton states in magnetic field
Dinh Van Tuan, Hanan Dery
We present a theory that studies the state composition of a bound exciton in magnetic field. Using a basis set made of products of free electron and hole wavefunctions in Landau ga…
Excitons in fractionally-filled moiré superlattices
Junghwan Kim, Hanan Dery, Dinh Van Tuan
Long-range Coulomb forces give rise to correlated insulating states when charge particles populate a moiré superlattice at certain fractional filling factors. Such behavior is cha…
Energy shifts and broadening of excitonic resonances in electrostatically-doped semiconductors
Hanan Dery, Cedric Robert, Scott A. Crooker +2
Tuning the density of resident electrons or holes in semiconductors provides crucial insight into the composition of excitonic complexes that are observed as absorption or photolum…
Component exchange theory of trions
Dinh Van Tuan, Hanan Dery
Treating the trion problem as an effective two-body system with exciton and electron components, we identify component exchange as the reason leading to trion formation. This mecha…
Effects of dynamical dielectric screening on the excitonic spectrum of monolayer semiconductors
Dinh Van Tuan, Hanan Dery
We present a new method to solve the dynamical Bethe-Salpeter Equation numerically. The method allows one to investigate the effects of dynamical dielectric screening on the spectr…