Despite intensive investigations of Bi2Se3 in past few years, the size and nature of the bulk energy band gap of this well-known 3D topological insulator still remain unclear. Here we report on a combined magneto-transport, photoluminescence and infrared transmission study of Bi2Se3, which unambiguously shows that the energy band gap of this material is direct and reaches Eg = (220 ± 5) meV at low temperatures.
G. Martinez et al., "Determination of the Energy Band Gap of Bi₂Se₃," Scientific Reports, vol. 7, no. 1, Nature Publishing Group, Jul 2017.
The definitive version is available at https://doi.org/10.1038/s41598-017-07211-x
Keywords and Phrases
Infrared Radiation; Low Temperature; Photoluminescence
International Standard Serial Number (ISSN)
Article - Journal
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01 Jul 2017