Weak Anti-Localization and Quantum Oscillations in Topological Crystalline Insulator PbTe  

作　　者：Ke-Jie Wang Wei Wang Min-Hao Zhang Xiao-Qian Zhang Pei Yang Bo Liu Ming Gao Da-Wei Huang Jun-Ran Zhang Yu-Jie Liu Xue-Feng Wang Feng-Qiu Wang Liang He Yong-Bing Xu Rong Zhang 王克杰;王伟;张敏昊;张晓倩;杨沛;刘波;高明;黄大威;张军然;刘玉杰;王学锋;王枫秋;何亮;徐永兵;张荣(Jiangsu Provincial Key Laboratory of Advanced Photonic and Electronic Materials,Jiangsu Provincial Key Laboratory for Nanotechnology,Collaborative Innovation Center of Advanced Microstructures,School of Electronic Science and Engineering,Nanjing University,Nanjing 210093)

机构地区：[1]Jiangsu Provincial Key Laboratory of Advanced Photonic and Electronic Materials,Jiangsu Provincial Key Laboratory for Nanotechnology,Collaborative Innovation Center of Advanced Microstructures,School of Electronic Science and Engineering,Nanjing University,Nanjing 210093

出　　处：《Chinese Physics Letters》2017年第2期67-70,共4页中国物理快报（英文版）

基　　金：Supported by the National Key Research and Development Program of China under Grant No 2016YFA0300803;the National Basic Research Program of China under Grant No 2014CB921101;the National Natural Science Foundation of China under Grant Nos 61474061 and 61674079

摘　　要：Topological crystalline insulators （TCIs） have attracted worldwide interest since their theoretical predication and have created exciting opportunities for studying topological quantum physics and for exploring spintronic appli- cations. In this work, we successfully synthesize PbTe nanowires via the chemical vapor deposition method and demonstrate the existence of topological surface states by their 2D weak anti-localization effect and Shubnikov-de Haas oscillations. More importantly, the surface state contributes ~61% of the total conduction, suggesting dom- inant surface transport in PbTe nanowires at low temperatures. Our work provides an experimental groundwork for researching TCIs and is a step forward for the applications of PbTe nanowires in spintronic devices.Topological crystalline insulators （TCIs） have attracted worldwide interest since their theoretical predication and have created exciting opportunities for studying topological quantum physics and for exploring spintronic appli- cations. In this work, we successfully synthesize PbTe nanowires via the chemical vapor deposition method and demonstrate the existence of topological surface states by their 2D weak anti-localization effect and Shubnikov-de Haas oscillations. More importantly, the surface state contributes ~61% of the total conduction, suggesting dom- inant surface transport in PbTe nanowires at low temperatures. Our work provides an experimental groundwork for researching TCIs and is a step forward for the applications of PbTe nanowires in spintronic devices.

关 键 词：Weak Anti-Localization and Quantum Oscillations in Topological Crystalline Insulator PbTe length 

分 类 号：TQ134.33[化学工程—无机化工]