194 citations · 523 across the 7 of their papers we have counts for
8 papers
Interlayer excitons in semiconductor bilayers under a strong electric field
S. Kovalchuk, K. Greben, A. Kumar +7
Excitons in bilayer transition metal dichalcogenides (2L-TMDs) are Coulomb-bound electron/hole pairs that can be viewed as broadly tunable analogs of atomic or molecular systems. H…
Impact of dark excitons on Förster type resonant energy transfer between dye molecules and atomically thin semiconductors
Manuel Katzer, Sviatoslav Kovalchuk, Kyrylo Greben +3
Interfaces of dye molecules and two-dimensional transition metal dichalcogenides (TMDCs) combine strong molecular dipole excitations with high carrier mobilities in semiconductors.…
Strain control of hybridization between dark and localized excitons in a 2D semiconductor
Pablo Hernández López, Sebastian Heeg, Christoph Schattauer +8
Mechanical strain is a powerful tuning knob for excitons, Coulomb-bound electron-hole complexes dominating optical properties of two-dimensional semiconductors. While the strain re…
Generating extreme electric fields in 2D materials by dual ionic gating
Benjamin I. Weintrub, Yu-Ling Hsieh, Jan N. Kirchhof +1
We demonstrate a new type of dual gate transistor to induce record electric fields through two-dimensional materials (2DMs). At the heart of this device is a 2DM suspended between…
Extrinsic localized excitons in patterned 2D semiconductors
D Yagodkin, K Greben, A Eljarrat +9
We demonstrate a new localized excitonic state in patterned monolayer 2D semiconductors. This state is not associated with lattice disorder but is extrinsic, i.e. results from exte…
In situ functionalization of graphene
Kyrylo Greben, Sviatoslav Kovalchuk, Ana M. Valencia +7
While the basal plane of graphene is inert, defects in it are centers of chemical activity. An attractive application of such defects is towards controlled functionalization of gra…
Intrinsic and Extrinsic Defect-related Excitons in TMDCs
Kyrylo Greben, Sonakshi Arora, Moshe G. Harats +1
We investigate an excitonic peak appearing in low-temperature photoluminescence of monolayer transition metal dichalcogenides (TMDCs), which is commonly associated with defects and…
Dynamics and efficient conversion of excitons to trions in non-uniformly strained monolayer WS
Moshe G. Harats, Jan N. Kirchhof, Mengxiong Qiao +2
We investigate the transport of excitons and trions in monolayer semiconductor WS subjected to controlled non-uniform mechanical strain. We actively control and tune the strain…