Author(s): Ozgur Burak Aslan, Minda Deng, and Tony F. HeinzThe authors investigate the influence of strain on the electronic properties of monolayer WSe2 using optical absorption and photoluminescence spectroscopy. The linewidth of the A exciton exhibits a significant and unexpected decrease, from 42 to 24 meV at room temperature. A slightly different behavior is observed for WS2; its linewidth decreases from 30 to 24 meV. They provide a model that explains both the decrease in linewidth and differences in the magnitude of the effect in these two similar material systems. Their findings reveal the utility of strain tuning for probing subtle aspects of 2D materials.[Phys. Rev. B 98, 115308] Published Thu Sep 27, 2018
Published in: "Physical Review B".