Nuclear magnetic resonance study of a Bi2Te3 topological insulator

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• 作者：D. Yu. Podorozhkin ; E. V. Charnaya ; A. Antonenko…
• 刊名：Physics of the Solid State
• 出版年：2015
• 出版时间：September 2015
• 年：2015
• 卷：57
• 期：9
• 页码：1741-1745
• 全文大小：277 KB
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• 作者单位：D. Yu. Podorozhkin (1)
  E. V. Charnaya (2)
  A. Antonenko (2)
  R. Mukhamad’yarov (2)
  V. V. Marchenkov (4) (4)
  S. V. Naumov (3)
  J. C. A. Huang (5)
  H. W. Weber (6)
  A. S. Bugaev (7)
  
  1. Centre for Diagnostics of Functional Materials for Medicine, Pharmacology and Nanoelectronics, St. Petersburg State University, ul. Ulyanovskaya 1, Petrodvorets, St. Petersburg, 198504, Russia
  2. St. Petersburg State University, Universitetskaya nab. 7-, St. Petersburg, 199034, Russia
  4. Ural Federal University named after the First President of Russia B. N. Yeltsin, ul. Mira 19, Yekaterinburg, 620002, Russia
  3. Institute of Metal Physics, Ural Branch, Russian Academy of Sciences, ul. Sofii Kovalevskoi 18, Yekaterinburg, 620990, Russia
  5. National Cheng Kung University, 1 University Road, Tainan City, 701, Taiwan
  6. Atominstitut (Institute of Atomic and Subatomic Physics), Vienna University of Technology, Stadionallee 2, Vienna, 1020, Austria
  7. Moscow Institute of Physics and Technology (State University), Institutskii per. 9, Dolgoprudnyi, Moscow oblast, 141700, Russia
  
• 刊物类别：Physics and Astronomy
• 刊物主题：Physics
  Solid State Physics and Spectroscopy
  Russian Library of Science
  
• 出版者：MAIK Nauka/Interperiodica distributed exclusively by Springer Science+Business Media LLC.
• ISSN：1090-6460

文摘

The results of the nuclear magnetic resonance (NMR) study of a grown high-quality Bi₂Te₃ semiconductor single crystal have been presented. Signals from the 125Te isotope were detected by the spin echo method in the range from 10 K to room temperature. It was found that the NMR spectrum consists of two lines. The line with a positive shift of the resonance frequency corresponded to the bulk of the sample. The line with a negative shift was interpreted as a signal from the surface of the single crystal. The temperature and orientational dependences of the positions of the NMR line of nuclei in the bulk of the crystal were studied. It was shown that the shifts are mainly determined by the Knight shift due to the interaction with mobile charge carriers. The thermoactivation character of the concentration of mobile charges in the crystal under study, which corresponds to the intrinsic conductance, was proved, and the energy parameters of the thermoactivation processes were calculated. Original Russian Text ? D.Yu. Podorozhkin, E.V. Charnaya, A. Antonenko, R. Mukhamad’yarov, V.V. Marchenkov, S.V. Naumov, J.C.A. Huang, H.W. Weber, A.S. Bugaev, 2015, published in Fizika Tverdogo Tela, 2015, Vol. 57, No. 9, pp. 1698-702.