132 citations · 690 across the 17 of their papers we have counts for
18 papers
Spin injection and emission helicity switching in a 2D perovskite/WSe2 heterostructure
Jakub Jasinski, Francesco Gucci, Thomas Brumme +16
The initialization and control of a long-lived spin population in lead halide perovskites are prerequisites for their use in spintronic applications. Here, we demonstrate circular…
All-electrical near-field injection of excitons in a van der Waals antiferromagnet
Jonas D. Ziegler, Sotirios Papadopoulos, Antti J. Moilanen +8
Van der Waals materials have become a promising building block for future electronics and photonics. The two-dimensional magnet CrSBr came into the spotlight of solid state researc…
Berry Curvature Signatures in Chiroptical Excitonic Transitions
Samuel Beaulieu, Shuo Dong, Viktor Christiansson +10
The topology of the electronic band structure of solids can be described by its Berry curvature distribution across the Brillouin zone. We theoretically introduce and experimentall…
Exciton fine structure splitting and linearly polarized emission in strained transition-metal dichalcogenide monolayers
M. M. Glazov, Florian Dirnberger, Vinod M. Menon +5
We study theoretically effects of an anisotropic elastic strain on the exciton energy spectrum fine structure and optical selection rules in atom-thin crystals based on transition-…
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…
Electron recoil effect in electrically tunable MoSe2 monolayers
Jonas Zipfel, Koloman Wagner, Marina A. Semina +5
Radiative recombination of excitons dressed by the interactions with free charge carriers often occurs under simultaneous excitation of either electrons or holes to unbound states.…
Spectral asymmetry of phonon sideband luminescence in monolayer and bilayer WSe2
Victor Funk, Koloman Wagner, Edith Wietek +8
We report an experimental study of temperature-dependent spectral lineshapes of phonon side-band emission stemming from dark excitons in monolayer and bilayer WSe. Using phot…
Observation of ultrafast interfacial Meitner-Auger energy transfer in a van der Waals heterostructure
Shuo Dong, Samuel Beaulieu, Malte Selig +23
Atomically thin layered van der Waals heterostructures feature exotic and emergent optoelectronic properties. With growing interest in these novel quantum materials, the microscopi…
Nonclassical Exciton Diffusion in Monolayer WSe2
Koloman Wagner, Jonas Zipfel, Roberto Rosati +9
We experimentally demonstrate time-resolved exciton propagation in a monolayer semiconductor at cryogenic temperatures. Monitoring phonon-assisted recombination of dark states, we…
Dark exciton-exciton annihilation in monolayer WSe
Daniel Erkensten, Samuel Brem, Koloman Wagner +8
The exceptionally strong Coulomb interaction in semiconducting transition-metal dichalcogenides (TMDs) gives rise to a rich exciton landscape consisting of bright and dark exciton…
Non-equilibrium diffusion of dark excitons in atomically thin semiconductors
Roberto Rosati, Koloman Wagner, Samuel Brem +7
Atomically thin semiconductors provide an excellent platform to study intriguing many-particle physics of tightly-bound excitons. In particular, the properties of tungsten-based tr…
Autoionization and dressing of excited excitons by free carriers in monolayer WSe2
Koloman Wagner, Edith Wietek, Jonas D. Ziegler +6
We experimentally demonstrate dressing of the excited exciton states by a continuously tunable Fermi sea of free charge carriers in a monolayer semiconductor. It represents an unus…
Fast and anomalous exciton diffusion in two-dimensional hybrid perovskites
Jonas D. Ziegler, Jonas Zipfel, Barbara Meisinger +7
Two-dimensional hybrid perovskites are currently in the spotlight of condensed matter and nanotechnology research due to their intriguing optoelectronic and vibrational properties…
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…
Light-matter coupling and non-equilibrium dynamics of exchange-split trions in monolayer WS2
Jonas Zipfel, Koloman Wagner, Jonas D. Ziegler +4
Monolayers of transition metal dichalcogenides present an intriguing platform to investigate the interplay of excitonic complexes in two dimensional semiconductors. Here, we use op…
Exciton diffusion in monolayer semiconductors with suppressed disorder
Jonas Zipfel, Marvin Kulig, Raül Perea-Causín +8
Tightly bound excitons in monolayer semiconductors represent a versatile platform to study two-dimensional propagation of neutral quasiparticles. Their intrinsic properties, howeve…
Exciton propagation and halo formation in two-dimensional materials
Raul Perea-Causin, Samuel Brem, Roberto Rosati +6
The interplay of optics, dynamics and transport is crucial for the design of novel optoelectronic devices, such as photodetectors and solar cells. In this context, transition metal…
Intrinsic Lifetime of Higher Excitonic States in Tungsten Diselenide Monolayers
Samuel Brem, Jonas Zipfel, Malte Selig +7
The reduced dielectric screening in atomically thin transition metal dichalcogenides allows to study the hydrogen-like series of higher exciton states in optical spectra even at ro…