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F. Libisch:
"Tracking the origin of single photon emitters in WSe2";
Talk: Graphene week 2019, Helsinki; 2019-09-23 - 2019-09-27.

Several recent measurements of single-photon emitters in monolayer WSe2 have established this two-dimensional material as a promising candidate for a reliable single photon source. While experiments point towards some combination of strain and point defects, a microscopic model for single-photon emitters in WSe2 explaining the underlying physics has proven elusive. We present a multi scale tight-binding model including non-uniform strain, defects and two-particle interactions using the Bethe-Salpeter equation. Our model quantitatively reproduces and explains several empirical findings, including the evolution of single-photon peaks with magnetic- and electric-fields.