104 citations · 322 across the 10 of their papers we have counts for
11 papers
Tunable magnons in a dual-gated 2D antiferromagnet
Nele Stetzuhn, Abhijeet M. Kumar, Sviatoslav Kovalchuk +12
The layered antiferromagnet CrSBr features magnons coupled to other quasiparticles, including excitons and polaritons, enabling their easy optical accessibility. In this work, we i…
Strain activation of localized states in WSe2
Oguzhan Yücel, Denis Yagodkin, Jan N. Kirchhof +5
Single-photon emission centers generated by controlled atomic force microscopy (AFM) indentation in monolayer WSe\(_2\) on a flexible polymer substrate are explored for application…
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…
Spin/valley coupled dynamics of electrons and holes at the interface
Abhijeet Kumar, Denis Yagodkin, Nele Stetzuhn +6
The coupled spin and valley degrees of freedom in transition metal dichalcogenides (TMDs) are considered a promising platform for information processing. Here, we use a TMD heteros…
Tunable graphene phononic crystal
Jan N. Kirchhof, Kristina Weinel, Sebastian Heeg +4
In the field of phononics, periodic patterning controls vibrations and thereby the flow of heat and sound in matter. Bandgaps arising in such phononic crystals realize low-dissipat…
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…
Neutral and charged excitons interplay in non-uniformly strain-engineered WS
Sviatoslav Kovalchuk, Moshe G. Harats, Guillermo López-Polín +3
We investigate the response of excitons in two-dimensional semiconductors subjected to controlled non-uniform strain fields. In our approach to non-uniform strain-engineering, a WS…