283 citations · 1k across the 11 of their papers we have counts for
7 papers · 1 filter
Electrically tunable layer-hybridized trions in doped WSe bilayers
Raul Perea-Causin, Samuel Brem, Fabian Buchner +6
Doped van der Waals heterostructures host layer-hybridized trions, i.e. charged excitons with layer-delocalized constituents holding promise for highly controllable optoelectronics…
Robust excitons across the phase transition of two-dimensional hybrid perovskites
Jonas D. Ziegler, Kai-Qiang Lin, Barbara Meisinger +11
Two-dimensional halide perovskites are among intensely studied materials platforms profiting from solution based growth and chemical flexibility. They feature exceptionally strong…
Twist-angle engineering of excitonic quantum interference and optical nonlinearities in stacked 2D semiconductors
Kai-Qiang Lin, Paulo E. Faria Junior, Jonas M. Bauer +6
Twist-engineering of the electronic structure of van-der-Waals layered materials relies predominantly on band hybridization between layers. Band-edge states in transition-metal-dic…
Large-scale mapping of moiré superlattices by Raman imaging of interlayer breathing mode and moiré phonons
Kai-Qiang Lin, Johannes Holler, Jonas M. Bauer +6
Moiré superlattices can induce correlated-electronic phases in twisted van-der-Waals materials. Strongly correlated quantum phenomena emerge, such as superconductivity and the Mott…
Bright excitons with negative-mass electrons
Kai-Qiang Lin, Chin Shen Ong, Sebastian Bange +15
Bound electron-hole excitonic states are generally not expected to form with charges of negative effective mass. We identify such excitons in a single layer of the semiconductor WS…
Hybridized intervalley moiré excitons and flat bands in twisted WSe bilayers
Samuel Brem, Kai-Qiang Lin, Roland Gillen +4
The large surface-to-volume ratio in atomically thin 2D materials allows to efficiently tune their properties through modifications of their environment. Artificial stacking of two…
Quantum interference in second-harmonic generation from monolayer WSe2
Kai-Qiang Lin, Sebastian Bange, John M. Lupton
A hallmark of wave-matter duality is the emergence of quantum-interference phenomena when an electronic transition follows different trajectories. Such interference results in asym…