Interface-induced monolayer superconductivity and hybrid topological electronic structure at the interface between monolayer FeTe and Bi2Te3 film

Topological superconductivity (TSC) has been proposed as an ideal platform for quantum computing qubits, as it could host Majorana bound states with non-Abelian statistics. The Majorana bounds states appear as zero energy mode appearing at topological defects, such as in the center of a magnetically induced superconducting vortex. However, many candidate TSC systems are doped materials with chemical inhomogeneity that limits the realization and turnability of the Majorana zero modes. Here we use molecular beam epitaxy (MBE) to grow high-quality monolayer FeTe on Bi2Te3 thin film where the topological surface states and the interface-induced superconductivity coexist within a chemically homogeneous interface. The interface-induced superconductivity is investigated by scanning tunning microscopy (STM) and electronic transport measurements, and the interfacial electron band and spin structures are studied by spin and angular resolved photoemission spectroscopy (SARPES). We will discuss how to optimize the interface electron band structure and spin texture formation through synthesis control and further show how this platform could be used to study the formation and the interactions of Majorana zero modes.