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Conferences > LS > 2014 > LW2I > LW2I.4

Excitonic Dark States in Single Atomic Layer of Transition Metal Dichalcogenide

Ziliang Ye, Ting Cao, Kevin O’Brien, Hanyu Zhu, Xiaobo Yin, Yuan Wang, Steven G. Louie, and Xiang Zhang

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Abstract

We experimentally discover a series excitonic dark states in two-photon excitation spectra of single-layer WS2. The findings quantitatively agree with the calculated excitonic state and suggest a large exciton binding energy of 0.7 eV.

© 2014 Optical Society of America

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