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. 2016 Dec 23;6:39619. doi: 10.1038/srep39619

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Copyright © 2016, The Author(s)

This work is licensed under a Creative Commons Attribution 4.0 International License. The images or other third party material in this article are included in the article’s Creative Commons license, unless indicated otherwise in the credit line; if the material is not included under the Creative Commons license, users will need to obtain permission from the license holder to reproduce the material. To view a copy of this license, visit http://creativecommons.org/licenses/by/4.0/

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(a) Normalized μPL spectra at magnetic field B = 0, 10, 20, and 30 T for an InSe flake with L ~ 5 layers in the Faraday geometry and B parallel to the c-axis (T = 4.2 K). (b) μPL spectra overlapped over a colour map of the PL intensity versus B and photon energy. The oscillations in the μPL intensity with B are due to the use of optical fibres (see Methods). The spectra are shown for B increasing from 0 to 30 T in steps of 2 T. (c) Energy peak position of the X₂ and X₁ bands and (d) ratio of their intensity, R, versus B. The line in part c) describes the linear shift of the X₂ band, i.e. E ∝ , where μ_⊥ = 0.14m_e is the reduced mass of the exciton. The dotted line in part d) is a guide to the eye.

Inline graphic — (a) Normalized μPL spectra at magnetic field B = 0, 10, 20, and 30 T for an InSe flake with L ~ 5 layers in the Faraday geometry and B parallel to the c-axis (T = 4.2 K). (b) μPL spectra overlapped over a colour map of the PL intensity versus B and photon energy. The oscillations in the μPL intensity with B are due to the use of optical fibres (see Methods). The spectra are shown for B increasing from 0 to 30 T in steps of 2 T. (c) Energy peak position of the X₂ and X₁ bands and (d) ratio of their intensity, R, versus B. The line in part c) describes the linear shift of the X₂ band, i.e. E ∝ , where μ_⊥ = 0.14m_e is the reduced mass of the exciton. The dotted line in part d) is a guide to the eye.