Evidence for topological superconductivity: Topological edge states in Bi2 Te3/FeTe heterostructure

• 作者: Bin Guo Fei Ye Gan Wang Hai-Lang Qin Hong-Tao He Jia-Wei Mei Kai-Ge Shi Liang Zhou Tian-Luo Pan Wei-Qiang Chen
• 来源期刊: 中国物理B（英文版）
• 年，卷（期）: 2020,（9）
• 所属期刊栏目: SPECIAL TOPIC—Topological 2D materials
• 页码范围: 48-54
• 页数: 7页
• 语种: 英文
• DOI: 10.1088/1674-1056/abaf9c

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.