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. 2017 Jul 21;7:6133. doi: 10.1038/s41598-017-05386-x

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© The Author(s) 2017

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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Fermi surfaces and photon energy dependence of band dispersion of SrSn₂As₂. (a) Fermi surface intensity plot of single crystal SrSn₂As₂ recorded at hv = 22 eV and T = 25 K with linear horizontal polarization. (b) to (e) Bands dispersion along cut recorded with different photon energy, respectively. LDA calculated bands are plotted on the experimental data for comparison. (f) and (g) Calculated bulk band structure along high symmetry line at k _z = 0 and k _z = π/c, respectively. (h) The fitted photon energy curve versus k _z.