Evidence for topological superconductivity: Topological edge states in Bi2Te3/FeTe heterostructure  

作　　者：Bin Guo Kai-Ge Shi Hai-Lang Qin Liang Zhou Wei-Qiang Chen Fei Ye Jia-Wei Mei Hong-Tao He Tian-Luo Pan Gan Wang 郭斌;师凯歌;秦海浪;周良;陈伟强;叶飞;梅佳伟;何洪涛;潘天洛;王干(Shenzhen Institute for Quantum Science and Engineering&Department of Physics,Southern University of Science and Technology,Shenzhen 518055,China;Guangdong Provincial Key Laboratory of Quantum Science and Engineering,Shenzhen Institute for Quantum Science and Engineering,Southern University of Science and Technology,Shenzhen 518055,China)

机构地区：[1]Shenzhen Institute for Quantum Science and Engineering&Department of Physics,Southern University of Science and Technology,Shenzhen 518055,China [2]Guangdong Provincial Key Laboratory of Quantum Science and Engineering,Shenzhen Institute for Quantum Science and Engineering,Southern University of Science and Technology,Shenzhen 518055,China

出　　处：《Chinese Physics B》2020年第9期45-50,共6页中国物理B（英文版）

基　　金：Project supported by the National Natural Science Foundation of China(Grant Nos.61734008 and 11774143);the National Key Research and Development Program of China(Grant Nos.2018YFA0307100,2016YFA0301703,and 2016YFA0300300);the Natural Science Foundation of Guangdong Province,China(Grant Nos.2015A030313840 and 2017A030313033);the State Key Laboratory of Low-Dimensional Quantum Physics(Grant No.KF201602);Technology and Innovation Commission of Shenzhen Municipality,China(Grant Nos.ZDSYS20170303165926217 and JCYJ20170412152334605);Guangdong Provincial Key Laboratory,China(Grant No.2019B121203002);J.-W.M.was partially supported by the Program for Guangdong Introducing Innovative and Entrepreneurial Teams,China(Grant No.2017ZT07C062).

摘　　要：Majorana fermions have been predicted to exist at the edge states of a two-dimensional topological superconductor.We fabricated single quintuple layer(QL)Bi2Te3/FeTe heterostructure with the step-flow epitaxy method and studied the topological properties of this system by using angle-resolved photoemission spectroscopy and scanning tunneling microscopy/spectroscopy.We observed the coexistence of robust superconductivity and edge states on the single QL Bi2Te3 islands which can be potential evidence for topological superconductor.

关 键 词：Bi2Te3/FeTe heterostructure topological superconductivity edge states scanning tunnelling microcopy 

分 类 号：TM26[一般工业技术—材料科学与工程]