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Boosting quantum yields in 2D semiconductors via proximal metal plates
Yongjun Lee, Anshuman Kumar, Johnathas D'arf Severo Forte +8
Monolayer transition metal dichalcogenides (1L-TMDs) have tremendous potential as atomically thin, direct bandgap semiconductors that can be used as convenient building blocks for…
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…
Temporal evolution of low-temperature phonon sidebands in WSe monolayers
Roberto Rosati, Samuel Brem, Raül Perea-Causín +9
Low-temperature photoluminescence (PL) of hBN-encapsulated monolayer tungsten diselenide (WSe) shows a multitude of sharp emission peaks below the bright exciton. Some of them…
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…