摘要
We investigate the interface between a three-dimensional Dirac semimetal Cd3As2 and a normal metal via softpoint contact spectroscopy measurement.The superconducting gap features were detected below 3.8 K and 7.1 K in the case of Cd3As2 single crystals sputter-coated with the Pt and Au films,respectively,in the differential conductance dI/dV-V plots of the point contacts.As the applied magnetic field increased,the drop in the zerobias contact resistance shifted toward lower temperatures.The topologically non-trivial band structure of Cd3As2 is considered to play a crucial role in inducing the superconductivity.Apart from realizing superconductivity in topological materials,our creative approach can be used to investigate possible topological superconductivity and exhibits a high application potential in electronic devices.
作者
Shuai Zhang
Yiyan Wang
Chaoyang Ma
Wenliang Zhu
Zhian Ren
Lei Shan
Genfu Chen
张帅;王义炎;麻朝阳;朱文亮;任治安;单磊;陈根富(Institute of Physics and Beijing National Laboratory for Condensed Matter Physics,Chinese Academy of Sciences,Beijing 100190,China;School of Physical Sciences,University of Chinese Academy of Sciences,Beijing 100049,China;Songshan Lake Materials Laboratory,Dongguan 523808,China;Key Laboratory of Structure and Functional Regulation of Hybrid Materials of Ministry of Education,Institutes of Physical Science and Information Technology,Anhui University,Hefei 230601,China)
基金
Supported by the National Natural Science Foundation of China(Grant Nos.11704403 and 11874417)
the National Key Research Program of China(Grant Nos.2016YFA0401000,2016YFA0300604,and 2018YFA070112)
the Strategic Priority Research Program(B)of Chinese Academy of Sciences(Grant No.XDB33010100)。
