Direct exciton emission from atomically thin transition metal dichalcogenide heterostructures near the lifetime limit

Jakob Wierzbowski, Julian Klein, Florian Sigger, Christian Straubinger, Malte Kremser, Takashi Taniguchi, Kenji Watanabe, Ursula Wurstbauer, Alexander W. Holleitner, Michael Kaniber, Kai Müller, Jonathan J. Finley