  The iron-based superconductors (FeSCs) have recently emerged as a promising
single-material Majorana platform by hosting isolated Majorana zero modes
(MZMs) at relatively high temperatures. To further verify its Majorana nature
and move forward to build topological quantum qubit, it is highly desirable to
achieve tunability for MZMs on homogeneous FeSCs. Here, with an in-situ strain
device, we can controllably create MZMs on the homogeneous surface of
stoichiometric superconductor LiFeAs by inducing a topological phase
transition. The evolution of discrete energy modes inside a strained vortex is
found to mimics exactly as the predicted topological vortex case, proving the
Majorana nature of emerging zero modes of vortex. Such tunability of MZMs in a
homogeneous superconductor is an important step toward their application in
topological quantum computation.
