Superconductivity at the Normal Metal/Dirac Semimetal Cd3As2 Interface

• 作者: Chaoyang Ma Genfu Chen Lei Shan Shuai Zhang Wenliang Zhu Yiyan Wang Zhian Ren
• 来源期刊: 中国物理快报（英文版）
• 年，卷（期）: 2020,（7）
• 所属期刊栏目: CONDENSED MATTER: ELECTRONIC STRUCTURE, ELECTRICAL, MAGNETIC, AND OPTICAL PROPERTIES
• 页码范围: 107-110
• 页数: 4页
• 语种: 英文
• DOI: 10.1088/0256-307X/37/7/077401

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 3.8K 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.