| Literature DB >> 26524129 |
He Wang1,2, Huichao Wang1,2, Haiwen Liu1,2, Hong Lu1,2, Wuhao Yang1,2, Shuang Jia1,2, Xiong-Jun Liu1,2, X C Xie1,2, Jian Wei1,2, Jian Wang1,2.
Abstract
Three-dimensional (3D) Dirac semimetals, which possess 3D linear dispersion in the electronic structure as a bulk analogue of graphene, have lately generated widespread interest in both materials science and condensed matter physics. Recently, crystalline Cd3As2 has been proposed and proved to be a 3D Dirac semimetal that can survive in the atmosphere. Here, by using point contact spectroscopy measurements, we observe exotic superconductivity around the point contact region on the surface of Cd3As2 crystals. The zero-bias conductance peak (ZBCP) and double conductance peaks (DCPs) symmetric around zero bias suggest p-wave-like unconventional superconductivity. Considering the topological properties of 3D Dirac semimetals, our findings may indicate that Cd3As2 crystals under certain conditions could be topological superconductors, which are predicted to support Majorana zero modes or gapless Majorana edge/surface modes in the boundary depending on the dimensionality of the material.Entities:
Year: 2015 PMID： 26524129 DOI： 10.1038/nmat4456
Source DB: PubMed Journal: Nat Mater ISSN： 1476-1122 Impact factor: 43.841