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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…
Ultrafast photocurrents in MoSe probed by terahertz spectroscopy
Denis Yagodkin, Lukas Nadvornik, Oliver Gueckstock +3
We use the terahertz (THz) emission spectroscopy to study femtosecond photocurrent dynamics in the prototypical 2D semiconductor, transition metal dichalcogenide MoSe. We ident…
Limits of funneling efficiency in non-uniformly strained 2D semiconductors
Moshe G. Harats, Kirill I. Bolotin
Photoexcited electron-hole pairs (excitons) in transition metal dichalcogenides (TMDC) experience an effective force when these materials are non-uniformly strained. In the case of…
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…