Valley-dependent Exciton Fine Structure and Autler-Townes Doublets from Berry Phases in Monolayer Molybdenum Diselenide

24 Dec 2018 Yong Chaw-Keong Utama M. Iqbal Bakti Ong Chin Shen Cao Ting Regan Emma C. Horng Jason Shen Yuxia Cai Hui Watanabe Kenji Taniguchi Takashi Tongay Sefaattin Deng Hui Zettl Alex Louie Steven G. Wang Feng

The Berry phase of Bloch states can have profound effects on electron dynamics lead to novel transport phenomena, such as the anomalous Hall effect and the valley Hall effect. Recently, it was predicted that the Berry phase effect can also modify the exciton states in transition metal dichalcogenide monolayers, and lift the energy degeneracy of exciton states with opposite angular momentum through an effective valley-orbital coupling... (read more)

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