Searching for Ideal Topological Superconductors in Pb-Sn-In-Te System

The discovery of 3D topological insulator materials and topological
superconductor open up a new research field in the condensed matter physics. In
order to search for the topological superconductor, we have grown a large number
of the single crystals of Pb-system ( Pb-Sn-In-Te) topological superconductor .
We have measured the physical properties on these single crystals by various
techniques. We have studied the effect of crystal growth condition, impurity and
composition on the bulk electrical conductivity of these single crystals. We try to
find out which composition and crystal growth condition is the best for the ideal
topological superconductor. We have got the bulk topological superconductor
with T c =5K.