Multi-Terminal Josephson Circuits Supporting Nontrivial Chern Topologies for Anyonic Qubits
Abstract
Interfacing bulk conducting topological Bi2Se3 films with s-wave superconductors initiates strong superconducting order in the nontrivial surface states. However, bulk insulating topological (Bi1-xSbx)2Te3 films on bulk Nb instead exhibit a giant attenuation of surface superconductivity, even for films only two layers thick. This massive suppression of proximity pairing is evidenced by ultrahigh-resolution band mappings and by contrasting quantified superconducting gaps with those of heavily n-doped topological Bi2Se3/Nb. The results underscore the limitations of using superconducting proximity effects to realize topological superconductivity in nearly intrinsic systems.
Document Details
- Document Type
- Technical Report
- Publication Date
- Mar 31, 2021
- Accession Number
- AD1187602
Entities
People
- Alexey Bezryadin
- James N. Eckstein
Organizations
- University of Illinois Urbana–Champaign