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.

Open PDF

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

Tags

DTIC Thesaurus Topics

  • Computer Programming
  • Critical Temperature
  • Dielectrics
  • Electrical Measurement
  • Electron Beam Lithography
  • Electrons
  • Flip Chips
  • Ground State
  • Hybrid Systems
  • Josephson Junctions
  • Magnetic Fields
  • Materials
  • Quantum Computers
  • Quantum Computing
  • Quantum Information
  • Quasiparticles
  • Resistance
  • Superconductivity
  • Three Dimensional

Fields of Study

  • Physics

Readers

  • Quantum Dot Semiconductor Device Photonics and Graphene Optoelectronic Materials and THz Physics.
  • Superconducting Magnet Technology

Technology Areas

  • Microelectronics
  • Microelectronics - Graphene