Progress in superconductor-semiconductor topological Josephson junctions

Abstract

Majorana bound states (MBSs) are quasiparticles which are their own antiparticles. They are predicted to emerge as zero-energy modes localized at the boundary of a topological superconductor. No intrinsic topological superconductor is known to date. However, by interfacing conventional superconductors and semiconductors with strong spin--orbit coupling it is possible to create a system hosting topological states. Hence epitaxial superconductors and semiconductors have emerged as an attractive materials system with atomically sharp interfaces and broad flexibility in device fabrications incorporating Josephson junctions. We discuss the basics of topological superconductivity and provide insight on how to go beyond current state-of-the-art experiments. We argue that the ultimate success in realizing MBS physics requires the observation of non-Abelian braiding and fusion experiments.

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Cited by in corpus (14)

• Materials for Quantum Technologies: a Roadmap for Spin and Topology
• Josephson effect and critical currents in trivial and topological full-shell hybrid nanowires
• Superconductivity in Substitutional Ga-Hyperdoped Ge Epitaxial Thin Films
• Linear non-saturating magnetoresistance and superconductivity in epitaxial thin films of YbSb${}_2$
• Side-gate modulation of supercurrent in InSb nanoflag-based Josephson junctions
• Planar Josephson junction devices with narrow superconducting strips: Topological properties and optimization
• Magnetic field-free braiding and nontrivial fusion of Majorana bound states in high-temperature planar Josephson junctions
• Antichiral edge states and Bogoliubov Fermi surfaces in a two-dimensional proximity-induced superconductor
• Exponential suppression of the topological gap in self-consistent intrinsic Majorana nanowires
• Current cross-correlation spectroscopy of Majorana bound states
• Diode effect in a skyrmion-coupled high-temperature Josephson junction
• Planar Hall supercurrent and δϕ-shift in the topological Josephson junction
• Buried Dirac points in quantum spin Hall insulators: Implications for Majorana Kramers pair-based quantum computing
• Rashba spin-orbit coupling and artificially engineered topological superconductors