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Quantum oscillations and nontrivial transport in(Bi_(0.92)In_(0.08))_2Se_3 |
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| Institution: | 1. National Laboratory of Solid State Microstructures, Collaborative Innovation Center of Advanced Microstructures, School of Electronic Science and Engineering, Nanjing University, Nanjing 210093, China; 2. National Laboratory of Solid State Microstructures, Collaborative Innovation Center of Advanced Microstructures, School of Physics, Nanjing University, Nanjing 210093, China |
| Abstract: | Quantum phase transition in topological insulators has drawn heightened attention in condensed matter physics and future device applications. Here we report the magnetotransport properties of single crystalline (Bi0.92In0.08)2Se3. The average mobility of~1000 cm2·V-1·s-1 is obtained from the Lorentz law at the low field (< 3 T) up to 50 K. The quantum oscillations rise at a field of~5 T, revealing a high mobility of~1.4×104 cm2·V-1·s-1 at 2 K. The Dirac surface state is evident by the nontrivial Berry phase in the Landau-Fan diagram. The properties make the (Bi0.92In0.08)2Se3 a promising platform for the investigation of quantum phase transition in topological insulators. |
| Keywords: | quantum phase transition topological insulators quantum oscillations Dirac surface state nontrivial Berry phase |
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