首页 | 本学科首页   官方微博 | 高级检索  
     


Superconductivity of Topological Surface States and Strong Proximity Effect in Sn1−xPbxTe–Pb Heterostructures
Authors:Hao Yang  Yao‐Yi Li  Teng‐Teng Liu  Huan‐Yi Xue  Dan‐Dan Guan  Shi‐Yong Wang  Hao Zheng  Can‐Hua Liu  Liang Fu  Jin‐Feng Jia
Affiliation:1. Key Laboratory of Artificial Structures and Quantum Control (Ministry of Education), Shenyang National Laboratory for Materials Science, School of Physics and Astronomy, Shanghai Jiao Tong University, Shanghai, 200240 China;2.
Abstract:Superconducting topological crystalline insulators are expected to form a new type of topological superconductors to host Majorana zero modes under the protection of lattice symmetries. The bulk superconductivity of topological crystalline insulators can be induced through chemical doping and the proximity effect. However, only conventional full gaps are observed, so the existence of topological superconductivity in topological crystalline insulators is still controversial. Here, the successful fabrication of atomically flat lateral and vertical Sn1?xPbxTe–Pb heterostructures by molecular beam epitaxy is reported. The superconductivity of the Sn1?xPbxTe–Pb heterostructures can be directly investigated by scanning tunneling spectroscopy. Unconventional peak–dip–hump gap features and fourfold symmetric quasiparticle interference patterns taken at the zero energy in the superconducting gap support the presence of the topological superconductivity in superconducting Sn1?xPbxTe. Strong superconducting proximity effect and easy preparation of various constructions between Sn1?xPbxTe and Pb make the heterostructures to be a promising candidate for topological superconducting devices to detect and manipulate Majorana zero modes in the future.
Keywords:heterostructures  proximity effect  superconductivity  topological crystalline insulators  toplogical surface states
设为首页 | 免责声明 | 关于勤云 | 加入收藏

Copyright©北京勤云科技发展有限公司  京ICP备09084417号