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. 2020 Nov 26;11:6021. doi: 10.1038/s41467-020-19816-4

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© The Author(s) 2020

Open Access This article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made. The images or other third party material in this article are included in the article’s Creative Commons license, unless indicated otherwise in a credit line to the material. If material is not included in the article’s Creative Commons license and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this license, visit http://creativecommons.org/licenses/by/4.0/.

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Fig. 2 — a Photoluminescence (PL) intensity in σ⁺ circular polarization as a function of photon energy and external B-field, in the forward sweep direction. The neutral exciton (X) and trion (T) are labeled. b Schematics of the electron-hole valley configurations of the two ground-state optically bright neutral excitons and positive trions in monolayer MoSe₂, which emit either a σ⁺ or σ⁻ polarized photon upon recombination. The pink (green) electron is spin ↑ (↓), and the hole is white, regardless of spin. Spin-valley locking ties the electron spin to the emission polarization. c Integrated trion PL intensity in both circular polarizations, for the forward (upper panel) and backward (lower panel) B-field sweep directions. d Degree of circular polarization (DOCP) as a function of photon energy and B-field, in the forward sweep direction. e DOCP of the exciton and trion states calculated from integrated intensities, shown for both sweep directions, revealing hysteresis type behavior in the trion. The error in DOCP for this figure is ~ ±0.005.