|Majorana Zero Mode Detected with Spin Selective Andreev Reflection in the Vortex of a Topological Su|
地点：Room 111,Physics Building
Recently, theory has predicted a Majorana zero mode (MZM) to induce spin selective Andreev reflection (SSAR), a novel magnetic property which can be used to detect the MZM. Here, spin-polarized scanning tunneling microscopy or spectroscopy has been applied to probe SSAR of MZMs in a topological superconductor of the Bi2Te3/NbSe2 heterostructure. The zero-bias peak of the tunneling differential conductance at the vortex center is observed substantially higher when the tip polarization and the external magnetic field are parallel rather than antiparallel to each other. This spin dependent tunneling effect provides direct evidence of MZM and reveals its magnetic property in addition to the zero energy modes. Our work will stimulate MZM research on these novel physical properties and, hence, is a step towards experimental study of their statistics and application in quantum computing.
Hao-hua Sun is a Ph.D. candidate in Key Laboratory of Artificial Structures and Quantum Control, Department of Physics and Astronomy, Shanghai Jiao Tong University. He obtained bachelor's degree in Department of Physics, Shanghai Jiao Tong University and continued his study in physics in the same university till now. He was awarded 2016 national scholarship by SJTU and 2016 Special scholarship for outstanding graduate students by Collaborative Innovation Center of Advanced Microstructures