Experimental realization of SQUIDs with topological insulator junctions

Abstract

We demonstrate topological insulator (Bi${}_2$Te${}_3$) dc SQUIDs, based on superconducting Nb leads coupled to nano-fabricated Nb-Bi${}_2$Te${}_3$-Nb Josephson junctions. The high reproducibility and controllability of the fabrication process allows the creation of dc SQUIDs with parameters that are in agreement with design values. Clear critical current modulation of both the junctions and the SQUID with applied magnetic fields have been observed. We show that the SQUIDs have a periodicity in the voltage-flux characteristic of ${\Phi }_0$, of relevance to the ongoing pursuit of realizing interferometers for the detection of Majorana fermions in superconductor- topological insulator structures.

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Cited by in corpus (23)

• Search for Majorana fermions in superconductors
• Nano Superconducting Quantum Interference device: a powerful tool for nanoscale investigations
• Quantum interference and Aharonov-Bohm oscillations in topological insulators
• Stability of Majorana Fermions in Proximity-Coupled Topological Insulator Nanowires
• Influence of Topological Edge States on the Properties of Al/Bi2Se3/Al Hybrid Josephson Devices
• Magnetotransport and induced superconductivity in Bi based three-dimensional topological insulators
• Andreev bound states and current-phase relations in three-dimensional topological insulators
• Topological Crystalline Insulator Nanostructures
• Signature of a topological phase transition in the Josephson supercurrent through a topological insulator
• Proximity-induced superconductivity and quantum interference in topological crystalline insulator SnTe thin film devices
• Optimizing the Majorana character of SQUIDs with topologically non-trivial barriers
• Josephson supercurrent in a topological insulator without a bulk shunt
• rf-SQUID measurements of anomalous Josephson effect
• Localized Many-Particle Majorana Modes with Vanishing Time-Reversal Symmetry Breaking in Double Quantum Dots
• Low-damage electron beam lithography for nanostructures on Bi${}_2$Te${}_3$-class topological insulator thin films
• Angle-resolved and core-level photoemission study of interfacing the topological insulator Bi1.5Sb0.5Te1.7Se1.3 with Ag, Nb and Fe
• Quantum transport in topological insulator hybrid structures -- A combination of topological insulator and superconductor
• Geometric dependence of Nb-Bi${}_2$Te${}_3$-Nb topological Josephson junction transport parameters
• Superconducting Quantum Interference Devices Made of Sb-doped Bi2Se3 Topological Insulator Nanoribbons
• Nearly flat Andreev bound states in superconductor-topological insulator hybrid structures
• Majorana-mediated thermoelectric transport in multiterminal junctions
• Micro-metric electronic patterning of a topological band structure using a photon beam
• Many-particle Majorana bound states: derivation and signatures in superconducting double quantum dots