Superconducting, Insulating, and Anomalous Metallic Regimes in a Gated Two-Dimensional Semiconductor-Superconductor Array

Abstract

The superconductor-insulator transition in two dimensions has been widely investigated as a paradigmatic quantum phase transition. The topic remains controversial, however, because many experiments exhibit a metallic regime with saturating low-temperature resistance, at odds with conventional theory. Here, we explore this transition in a novel, highly controllable system, a semiconductor heterostructure with epitaxial Al, patterned to form a regular array of superconducting islands connected by a gateable quantum well. Spanning nine orders of magnitude in resistance, the system exhibits regimes of superconducting, metallic, and insulating behavior, along with signatures of flux commensurability and vortex penetration. An in-plane magnetic field eliminates the metallic regime, restoring the direct superconductor-insulator transition, and improves scaling, while strongly altering the scaling exponent.

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Cited by in corpus (60)

• Anomalous metals -- failed superconductors
• Quantum coherence across bosonic superconductor-anomalous metal-insulator transitions
• Quantum breakdown of superconductivity in low-dimensional materials
• Gate Controlled Anomalous Phase Shift in Al/InAs Josephson Junctions
• The density and disorder tuned superconductor-metal transition in two dimensions
• Missing Shapiro steps in topologically trivial Josephson Junction on InAs quantum well
• A strange metal in a bosonic system
• Hard superconducting gap in germanium
• High-Energy Quasiparticle Injection into Mesoscopic Superconductors
• Induced superconducting pairing in integer quantum Hall edge states
• Exceptional odd-frequency pairing in non-Hermitian superconducting systems
• Coexistence of resistance oscillations and the anomalous metal phase in a lithium intercalated TiSe${}_2$ superconductor
• Extrinsic and Intrinsic Anomalous Metallic States in Transition Metal Dichalcogenide Ising Superconductors
• Gate-tunable, superconductor-semiconductor parametric amplifier
• Enhanced, phase coherent, multifractal-like, two-dimensional superconductivity
• Quantum phase transitions in two-dimensional superconductors: a review on recent experimental progress
• Bosonic topological insulator intermediate state in the superconductor-insulator transition
• Anomalous metals: from "failed superconductor" to "failed insulator"
• Dynamical vortex transitions in a gate-tunable Josephson junction array
• Suppressing quasiparticle poisoning with a voltage-controlled filter
• Universal behavior of the bosonic metallic ground state in a two-dimensional superconductor
• Exceptional degeneracies in non-Hermitian Rashba semiconductors
• Coexistence of superconductivity and weak anti-localization at KTaO3 (111) interfaces
• A quantum dot in germanium proximitized by a superconductor
• Superconductor-insulator transitions in three-dimensional indium-oxide at high pressures
• High-Temperature Anomalous Metal States in Iron-Based Interface Superconductors
• Magnetic monopoles and superinsulation in Josephson junction arrays
• Evolution of $4\pi$-periodic Supercurrent in the Presence of In-plane Magnetic Field
• Robust anomalous metallic states and vestiges of self duality in two-dimensional granular In-InOx composites
• Superconductor--Insulator Transition in a non-Fermi Liquid
• Majorana bound states in vortex lattices on iron-based superconductors
• Little-Parks like oscillations in lightly doped cuprate superconductors
• Anodic Oxidation of Epitaxial Superconductor-Semiconductor Hybrids
• Metallic transport of hard core bosons
• Quantum simulation of the tricritical Ising model in tunable Josephson junction ladders
• Universal phase diagram of topological superconductors subjected to magnetic flux
• The Berezinskii-Kosterlitz-Thouless Transition and Anomalous Metallic Phase in a Hybrid Josephson Junction Array
• New paradigm for a disordered superconductor in a magnetic field
• Origin of Topological Order in a Cooper Pair Insulator
• Majorana Zero Modes in Cylindrical Semiconductor Quantum Wire
• Vortex dynamics induced by scanning SQUID susceptometry
• Disorder and magnetic field induced Bose-metal state in two-dimensional Ta${}_x$(SiO${}_2$)${}_{1-x}$ granular films
• Thouless pumping in Josephson junction arrays
• Three-dimensional quantum Griffiths singularity in bulk iron-pnictide superconductors
• Fermionic Quantum Simulation on Andreev Bound State Superlattices
• Critical anomalous metals near superconductivity in models with random interactions
• Resistivity tensor of vortex-lattice states in Josephson junction arrays
• Josephson junction arrays as a platform for topological phases of matter
• Walking behavior induced by $\mathcal{P}\mathcal{T}$ symmetry breaking in a non-Hermitian $\mathrm{XY}$ model with clock anisotropy
• Moiré-enabled topological superconductivity
• Spontaneous supercurrents and vortex depinning in two-dimensional arrays of ${\phi }_0$-junctions
• Gapless superconductivity in the low-frequency electrodynamic response of two-dimensional granular In/InO${}_x$ composites
• Voltage-tuned anomalous-metal to metal transition in hybrid Josephson junction arrays
• From Kardar-Parisi-Zhang scaling to soliton proliferation in Josephson junction arrays
• Hysteresis and jumps in the I-V curves of disordered two-dimensional materials
• Engineering a Josephson junction chain for the simulation of the clock model
• Electrically controlled quantum transition to an anomalous metal in 2D
• Microwave radiometry of a quantum-critical, hybrid Josephson array
• Zero temperature superconductor - edge metal - insulator transition in $2D$ bosonic systems
• Local Control of Supercurrent Density in Epitaxial Planar Josephson Junctions