  The exploration of topological superconductivity and Majorana zero modes has
become a rapidly developing field. Many types of proposals to realize
topological superconductors have been presented, and significant advances have
been recently made. In this review, we conduct a survey on the experimental
progress in possible topological superconductors and induced superconductivity
in topological insulators or semimetals as well as artificial structures. The
approaches to inducing superconductivity in topological materials mainly
include high pressure application, the hard-tip point contact method, chemical
doping or intercalation, the use of artificial topological superconductors, and
electric field gating. The evidence supporting topological superconductivity
and signatures of Majorana zero modes are also discussed and summarized.

Superconductivity