Zobrazeno 1 - 10
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pro vyhledávání: '"Wagner, Koloman"'
Autor:
Zipfel, Jonas, Wagner, Koloman, Semina, Marina A., Ziegler, Jonas D., Taniguchi, Takashi, Watanabe, Kenji, Glazov, Mikhail M., Chernikov, Alexey
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. This phenomenon, known as the electron recoil effect, manifests itsel
Externí odkaz:
http://arxiv.org/abs/2111.07676
Autor:
Funk, Victor, Wagner, Koloman, Wietek, Edith, Ziegler, Jonas D., Förste, Jonathan, Lindlau, Jessica, Förg, Michael, Watanabe, Kenji, Taniguchi, Takashi, Chernikov, Alexey, Högele, Alexander
We report an experimental study of temperature-dependent spectral lineshapes of phonon side-band emission stemming from dark excitons in monolayer and bilayer WSe$_{2}$. Using photoluminescence spectroscopy in the range from 4 to 100K, we observe a p
Externí odkaz:
http://arxiv.org/abs/2110.09583
Autor:
Wagner, Koloman, Zipfel, Jonas, Rosati, Roberto, Wietek, Edith, Ziegler, Jonas D., Brem, Samuel, Pera-Causín, Raül, Taniguchi, Takashi, Watanabe, Kenji, Glazov, Mikhail M., Malic, Ermin, Chernikov, Alexey
We experimentally demonstrate time-resolved exciton propagation in a monolayer semiconductor at cryogenic temperatures. Monitoring phonon-assisted recombination of dark states, we find a highly unusual case of exciton diffusion. While at 5 K the diff
Externí odkaz:
http://arxiv.org/abs/2107.11168
Autor:
Erkensten, Daniel, Brem, Samuel, Wagner, Koloman, Gillen, Roland, Perea-Causin, Raul, Ziegler, Jonas D., Taniguchi, Takashi, Watanabe, Kenji, Maultzsch, Janina, Chernikov, Alexey, Malic, Ermin
Publikováno v:
Phys. Rev. B 104, L241406 (2021)
The exceptionally strong Coulomb interaction in semiconducting transition-metal dichalcogenides (TMDs) gives rise to a rich exciton landscape consisting of bright and dark exciton states. At elevated densities, excitons can interact through exciton-e
Externí odkaz:
http://arxiv.org/abs/2106.05035
Autor:
Rosati, Roberto, Wagner, Koloman, Brem, Samuel, Perea-Causín, Raül, Ziegler, Jonas D., Zipfel, Jonas, Taniguchi, Takashi, Watanabe, Kenji, Chernikov, Alexey, Malic, Ermin
Atomically thin semiconductors provide an excellent platform to study intriguing many-particle physics of tightly-bound excitons. In particular, the properties of tungsten-based transition metal dichalcogenides are determined by a complex manifold of
Externí odkaz:
http://arxiv.org/abs/2105.10232
Autor:
Wagner, Koloman, Wietek, Edith, Ziegler, Jonas D., Semina, Marina, Taniguchi, Takashi, Watanabe, Kenji, Zipfel, Jonas, Glazov, Mikhail M., Chernikov, Alexey
Publikováno v:
Phys. Rev. Lett. 125, 267401 (2020)
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 unusual scenario of two-particle excitations of charged excitons previousl
Externí odkaz:
http://arxiv.org/abs/2007.05396
Autor:
Rosati, Roberto, Brem, Samuel, Perea-Causín, Raül, Wagner, Koloman, Wietek, Edith, Zipfel, Jonas, Selig, Malte, Taniguchi, Takashi, Watanabe, Kenji, Knorr, Andreas, Chernikov, Alexey, Malic, Ermin
Publikováno v:
ACS Photonics 2020, 7, 10, 2756-2764
Low-temperature photoluminescence (PL) of hBN-encapsulated monolayer tungsten diselenide (WSe$_2$) shows a multitude of sharp emission peaks below the bright exciton. Some of them have been recently identified as phonon sidebands of momentum-dark sta
Externí odkaz:
http://arxiv.org/abs/2006.09951
Autor:
Zipfel, Jonas, Wagner, Koloman, Ziegler, Jonas D., Taniguchi, Takashi, Watanabe, Kenji, Semina, Marina A., Chernikov, Alexey
Monolayers of transition metal dichalcogenides present an intriguing platform to investigate the interplay of excitonic complexes in two dimensional semiconductors. Here, we use optical spectroscopy to study light-matter coupling and non-equilibrium
Externí odkaz:
http://arxiv.org/abs/2005.03870
Akademický článek
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Autor:
Wagner, Koloman
Two-dimensional semiconductors such as monolayer transition metal dichalcogenides (TMDCs) evolved to a versatile platform to explore elementary optoelectronic phenomena. In these systems, excitons with firm light-matter coupling and spin-valley locki
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::807f45abafaa63df3faeae7980a31920
https://epub.uni-regensburg.de/54036/
https://epub.uni-regensburg.de/54036/