Nonanalyticity, Valley Quantum Phases, and Lightlike Exciton Dispersion in Monolayer Transition Metal Dichalcogenides: Theory and First-Principles Calculations

Author(s): Diana Y. Qiu, Ting Cao, and Steven G. Louie

An ab-initio calculation shows that excitons in a monolayer of the transition metal dichalcogenide MoS${}_2$ exhibit an unusual low-energy dispersion pattern.

[Phys. Rev. Lett. 115, 176801] Published Tue Oct 20, 2015