Abstract
77Se nuclear magnetic resonance (NMR) measurements in the Bi2Se3 topological insulator single crystal were carried out at temperatures 15.8, 88, and 293 K. Bismuth selenide single crystalline plate was studied in the orientation when the crystallographic c-axis was parallel to the external magnetic field B0. We observed two component NMR spectra at the three temperatures. It was shown that the NMR spectrum almost did not move with decreasing temperature and the density of charge carriers did not follow the thermal activation law.
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Acknowledgements
NMR and XRD measurements were carried out using the equipment of the Research park of St. Petersburg State University. We acknowledge the financial support from the Russian Foundation for Dasic Research (project nos. 16-57-52009 and 17-52-52008), by the Federal Agency for Scientific Organizations of Russia (program “Spin” no. 01201463330), and by the Government of the Russian Federation (state contract no. 02.A03.21.0006).
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Antonenko, A.O., Nefedov, D.Y., Charnaya, E.V. et al. 77Se Low-Temperature NMR in the Bi2Se3 Single Crystalline Topological Insulator. Appl Magn Reson 49, 599–605 (2018). https://doi.org/10.1007/s00723-018-0986-1
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DOI: https://doi.org/10.1007/s00723-018-0986-1