Proximity effect induced intriguing superconductivity in van der Waals
heterostructure of magnetic topological insulator and conventional
superconductor
Nontrivial topological superconductivity has received enormous research
attentions due to its potential for diverse applications in topological quantum
computing. The intrinsic issue concerning the correlation between a topological
insulator and a superconductor is, however, still widely open. Here, we
systemically report an emergent superconductivity in a cross-junction composed
of a magnetic topological insulator MnBi2Te4 and a conventional superconductor
NbSe2. Remarkably, the interface indicates existence of a reduced
superconductivity at surface of NbSe2 and a proximity-effectinduced
superconductivity at surface of MnBi2Te4. Furthermore, the in-plane
angular-dependent magnetoresistance measurements reveal the fingerprints of the
paring symmetry behaviors for these superconducting gaps as a unconventional
nature. Our findings extend our views and ideas of topological
superconductivity in the superconducting heterostructures with time-reversal
symmetry breaking, offering an exciting opportunity to elucidate the
cooperative effects on the surface state of a topological insulator aligning a
superconductor.Comment: 6 pages, 4 figure