| 1 | Molecular beam epitaxy of superconducting PdTe_2 films on topological insulator Bi_2Te_3显示文摘Majorana fermions have been observed in topological insulator/s-wave superconductor heterostructures. To manipulate Majorana fermions, superconducting materials should be deposited on the surfaces of topological insulators. In this study, highquality superconducting PdTe_2 films are deposited on the topological insulator Bi_2Te_3 surface using molecular beam epitaxy. The surface topography and electronic properties of PdTe_2/Bi_2Te_3 heterostructures are investigated via in situ scanning tunneling microscopy/spectroscopy. Under Te-rich conditions, the Pd atoms presumably form PdTe_2 film on Bi_2Te_3 surface rather than diffuse into Bi_2Te_3. The superconductivity of the PdTe_2/Bi_2Te_3 heterostructure is detected at a transition temperature of ~1.4 K using the two-coil mutual inductance technique. This study proposes a method for fabricating superconducting materials on topological insulator surfaces at low doping levels, paving ways for designing nanodevices that can manipulate Majorana fermions. | HuanYi Xue Hao Yang YanFu Wu Gang Yao Dandan Guan ShiYong Wang Hao Zheng CanHua Liu YaoYi Li JinFeng Jia | 2019 | Science China(Physics,Mechanics & Astronomy)2019，62，7： | 1 |
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