539 citations · 3.3k across the 31 of their papers we have counts for
31 papers
Emergent Trion-Phonon Coupling in Atomically-Reconstructed MoSe-WSe Heterobilayers
Sebastian Meier, Yaroslav Zhumagulov, Matthias Dietl +8
In low-temperature resonant Raman experiments on MoSe-WSe heterobilayers, we identify a hybrid interlayer shear mode (HSM) with an energy, close to the interlayer shear mod…
Valley-magnetophonon resonance for interlayer excitons
D. S. Smirnov, J. Holler, M. Kempf +8
Heterobilayers consisting of MoSe and WSe monolayers can host optically bright interlayer excitons with intriguing properties such as ultralong lifetimes and pronounced cir…
Interlayer exciton valley polarization dynamics in large magnetic fields
Johannes Holler, Malte Selig, Michael Kempf +11
In van der Waals heterostructures (HS) consisting of stacked MoSe and WSe monolayers, optically bright interlayer excitons (ILE) can be observed when the constituent layers…
Ultrafast charge-transfer dynamics in twisted MoS/WSe heterostructures
J. E. Zimmermann, M. Axt, F. Mooshammer +5
Two-dimensional transition metal dichalcogenides (TMD) offer a unique platform for creating van-der-Waals heterojunctions with fascinating physical properties and promising applica…
Low-frequency Raman scattering in WSe-MoSe heterobilayers: Evidence for atomic reconstruction
Johannes Holler, Sebastian Meier, Michael Kempf +5
We investigate WSe-MoSe heterobilayers with different twist angles between the two layers, by low-frequency Raman scattering. In sufficiently aligned samples with…
Ultrafast transition between exciton phases in van der Waals heterostructures
Philipp Merkl, Fabian Mooshammer, Philipp Steinleitner +11
Heterostructures of atomically thin van der Waals bonded monolayers have opened a unique platform to engineer Coulomb correlations, shaping excitonic, Mott insulating, or supercond…
Absence of a giant spin Hall effect in plasma-hydrogenated graphene
Tobias Völkl, Denis Kochan, Thomas Ebnet +8
The weak spin-orbit interaction in graphene was predicted to be increased, e.g., by hydrogenation. This should result in a sizable spin Hall effect (SHE). We employ two different m…
Spatial extent of the excited exciton states in WS monolayers from diamagnetic shifts
Jonas Zipfel, Johannes Holler, Anatolie A. Mitioglu +9
We experimentally study the radii of excitons in hBN-encapsulated WS2 monolayers by means of magneto-optical reflectance spectroscopy at cryogenic temperatures in magnetic fields u…
Direct observation of ultrafast exciton formation in monolayer WSe
Philipp Steinleitner, Philipp Merkl, Philipp Nagler +5
Many of the fundamental optical and electronic properties of atomically thin transition metal dichalcogenides are dominated by strong Coulomb interactions between electrons and hol…
Dielectric Engineering of Electronic Correlations in a van der Waals Heterostructure
Philipp Steinleitner, Philipp Merkl, Alexander Graf +10
Heterostructures of van der Waals bonded layered materials offer unique means to tailor dielectric screening with atomic-layer precision, opening a fertile field of fundamental res…
Exciton diffusion and halo effects in monolayer semiconductors
Marvin Kulig, Jonas Zipfel, Philipp Nagler +6
We directly monitor exciton propagation in freestanding and SiO2-supported WS2 monolayers through spatially- and time-resolved micro-photoluminescence under ambient conditions. We…
Momentum-space indirect interlayer excitons in transition metal dichalcogenide van der Waals heterostructures
Jens Kunstmann, Fabian Mooshammer, Philipp Nagler +9
Monolayers of transition metal dichalcogenides (TMDCs) feature exceptional optical properties that are dominated by excitons, tightly bound electron-hole pairs. Forming van der Waa…
Zeeman Splitting and Inverted Polarization of Biexciton Emission in Monolayer WS2
Philipp Nagler, Mariana V. Ballottin, Anatolie A. Mitioglu +8
We investigate the magnetic-field-induced splitting of biexcitons in monolayer WS using polarization-resolved photoluminescence spectroscopy in out-of-plane magnetic fields up…
Characterization of highly crystalline lead iodide nanosheets prepared by room-temperature solution processing
Riccardo Frisenda, Joshua O. Island, Jose L. Lado +15
Two-dimensional semiconducting materials are particularly appealing for many applications. Although theory predicts a large number of two-dimensional materials, experimentally only…
Observation of macroscopic valley-polarized monolayer exciton-polaritons at room temperature
N. Lundt, S. Stoll, P. Nagler +10
In this letter, we address the chiral properties of valley exciton-polaritons in a monolayer of WS2 in the regime of strong light-matter coupling with a Tamm-Plasmon resonance. We…
Long-lived spin polarization in n-doped MoSe monolayers
Markus Schwemmer, Philipp Nagler, Andreas Hanninger +2
Transition metal dichalcogenide monolayers are highly interesting for potential valleytronic applications due to the coupling of spin and valley degrees of freedom and valley-selec…
Valley Dynamics of Excitons in Monolayer Dichalcogenides
Gerd Plechinger, Philipp Nagler, Ashish Arora +6
Monolayer transition-metal dichalcogenides (TMDCs) have recently emerged as possible candidates for valleytronic applications, as the spin and valley pseudospin are directly couple…
Valley polarized relaxation and upconversion luminescence from Tamm-Plasmon Trion-Polaritons with a MoSe2 monolayer
N. Lundt, P. Nagler, A. Nalitov +11
Transition metal dichalcogenides represent an ideal testbed to study excitonic effects, spin-related phenomena and fundamental light-matter coupling in nanoscopic condensed matter…
Giant Zeeman splitting inducing near-unity valley polarization in van der Waals heterostructures
Philipp Nagler, Mariana V. Ballottin, Anatolie A. Mitioglu +8
Monolayers of semiconducting transition metal dichalcogenides exhibit intriguing fundamental physics of strongly coupled spin and valley degrees of freedom for charge carriers. Whi…
Interlayer exciton dynamics in a dichalcogenide monolayer heterostructure
Philipp Nagler, Gerd Plechinger, Mariana V. Ballottin +8
In heterostructures consisting of different transition-metal dichalcogenide monolayers, a staggered band alignment can occur, leading to rapid charge separation of optically genera…
Direct observation of the band gap transition in atomically thin ReS
Mathias Gehlmann, Irene Aguilera, Gustav Bihlmayer +13
ReS is considered as a promising candidate for novel electronic and sensor applications. The low crystal symmetry of the van der Waals compound ReS leads to a highly anisot…
Spectral focusing of broadband silver electroluminescence in nanoscopic FRET-LEDs
Robin P. Puchert, Florian Steiner, Gerd Plechinger +10
Few inventions have shaped the world like the incandescent bulb. While Edison used thermal radiation from ohmically heated conductors, some noble metals exhibit "cold" electrolumin…
Coulomb engineering of the bandgap in 2D semiconductors
Archana Raja, Andrey Chaves, Jaeeun Yu +13
The ability to control the size of the electronic bandgap is an integral part of solid-state technology. Atomically-thin two-dimensional crystals offer a new approach for tuning th…
Excitonic valley effects in monolayer WS under high magnetic fields
Gerd Plechinger, Philipp Nagler, Ashish Arora +10
Transition-metal dichalcogenides can be easily produced as atomically thin sheets, exhibiting the possibility to optically polarize and read out the valley pseudospin of extremely…