摘要
The Major ana zero mode(MZM), which manifests as an exotic neutral excitation in superconductors, is the building block of topological quantum computing. It has recently been found in the vortices of several iron-based superconductors as a zero-bias conductance peak in tunneling spectroscopy. In particular, a clean and robust MZM has been observed in the cores of free vortices in(Li_(0.84)Fe_(0.16))OHFeSe. Here using scanning tunneling spectroscopy, we demonstrate that Major ana-induced resonant Andreev reflection occurs between the STM tip and this zero-bias bound state,and consequently, the conductance at zero bias is quantized as 2e^2/h. Our results present a hallmark signature of the MZM in the vortex of an intrinsic topological superconductor, together with its intriguing behavior.
The Major ana zero mode(MZM), which manifests as an exotic neutral excitation in superconductors, is the building block of topological quantum computing. It has recently been found in the vortices of several iron-based superconductors as a zero-bias conductance peak in tunneling spectroscopy. In particular, a clean and robust MZM has been observed in the cores of free vortices in(Li_(0.84)Fe_(0.16))OHFeSe. Here using scanning tunneling spectroscopy, we demonstrate that Major ana-induced resonant Andreev reflection occurs between the STM tip and this zero-bias bound state,and consequently, the conductance at zero bias is quantized as 2e^2/h. Our results present a hallmark signature of the MZM in the vortex of an intrinsic topological superconductor, together with its intriguing behavior.
作者
C.Chen
Q.Liu
T.Z.Zhang
D.Li
P.P.Shen
X.L.Dong
Z.-X.Zhao
T.Zhang
D.L.Feng
陈晨;刘琴;张天真;李栋;沈沛沛;董晓莉;赵忠贤;张童;封东来(State Key Laboratory of Surface Physics and Department of Physics, Fudan University;Collaborative Innovation Center of Advanced Microstructures;Science and Technology on Surface Physics and Chemistry Laboratory;National Laboratory of Superconductivity, Institute of Physics, Chinese Academy of Sciences;Hefei National Laboratory for Physical Science at Microscale, CAS Center for Excellence in Quantum Information and Quantum Physics, and Department of Physics, University of Science and Technology of China)
基金
Supported by the National Natural Science Foundation of China
the National Key R&D Program of China under Grant Nos2016YFA0300200,2017YFA0303004 and 2017YFA0303003
the Key Research of Frontier Sciences of CAS under Grant No QYZDY-SSW-SLH001
