Quantum oscillations and nontrivial transport in (Bi0.92In0.08)2Se3  

作　　者：张敏昊 李焱 宋凤麒 王学锋 张荣 

机构地区：[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

出　　处：《Chinese Physics B》2017年第12期76-79,共4页中国物理B（英文版）

基　　金：Project supported by the National Key Basic Research Program of China(Grant Nos.2014CB921103 and 2017YFA0206304);the National Natural Science Foundation of China(Grant Nos.U1732159 and 11274003);Collaborative Innovation Center of Solid-State Lighting and Energy-Saving Electronics,China

摘　　要：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.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.

关 键 词：quantum phase transition topological insulators quantum oscillations Dirac surface state nontrivial Berry phase 

分 类 号：O469[理学—凝聚态物理]