Quantum Metallicity on the High-Field Side of the Superconductor-Insulator Transition

Abstract

We investigate ultrathin superconducting TiN films, which are very close to the localization threshold. Perpendicular magnetic field drives the films from the superconducting to an insulating state, with very high resistance. Further increase of the magnetic field leads to an exponential decay of the resistance towards a finite value. In the limit of low temperatures, the saturation value can be very accurately extrapolated to the universal quantum resistance h/e^2. Our analysis suggests that at high magnetic fields a new ground state, distinct from the normal metallic state occurring above the superconducting transition temperature, is formed. A comparison with other studies on different materials indicates that the quantum metallic phase following the magnetic-field-induced insulating phase is a generic property of systems close to the disorder-driven superconductor-insulator transition.

4 pages, 4 figures, published version

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Cited by in corpus (44)

• Electrodynamics of Correlated Electron Materials
• Localization of preformed Cooper-pairs in disordered superconductors
• Disorder-Induced Inhomogeneities of the Superconducting State Close to the Superconductor-Insulator Transition
• Fractal superconductivity near localization threshold
• Localized Superconductivity in the Quantum-Critical Region of the Disorder-Driven Superconductor-Insulator Transition in TiN Thin Films
• Pseudogap in a thin film of a conventional superconductor
• Quantum breakdown of superconductivity in low-dimensional materials
• Phase diagram of a strongly disordered s-wave superconductor, NbN, close to the metal-insulator transition
• The approach to a superconductor-to-Bose-insulator transition in disordered films
• Superinsulator-Superconductor Duality in Two Dimensions
• Self Duality and a possible Hall-insulator phase near the superconductor-to-insulator transition in two-dimensional indium-oxide films
• Nanopattern-stimulated superconductor-insulator transition in thin TiN films
• High field termination of a Cooper-pair insulator
• The role of Coulomb interaction in superconducting NbTiN thin films
• Hyperactivated resistance in TiN films on the insulating side of the disorder-driven superconductor-insulator transition
• Evidence of Spatially Inhomogeous Pairing on the Insulating Side of a Disorder-Tuned Superconductor-Insulator Transition
• Superconductor to weak-insulator transitions in disordered Tantalum Nitride films
• Quantum criticality at the superconductor to insulator transition revealed by specific heat measurements
• Quantum criticality at the superconductor insulator transition probed by the Nernst effect
• Charge Dynamics Across the Disorder Driven Superconductor-Insulator Transition
• Localization and Superconductivity in Doped Semiconductors
• Homogeneous superconducting phase in TiN film : a complex impedance study
• Robust anomalous metallic states and vestiges of self duality in two-dimensional granular In-InOx composites
• Compensation driven superconductor-insulator transition
• Strong quantum interference in strongly disordered bosonic insulators
• Electric breakdown effect in the current-voltage characteristics of amorphous indium oxide thin films near the superconductor-insulator transition
• Hopping conductance and macroscopic quantum tunneling effect in three dimensional Pb${}_x$(SiO${}_2$)${}_{1-x}$ nanogranular films
• Magnetic field tuned superconductor-to-insulator transition at the LaAlO${}_3$ /SrTiO${}_3$ interface
• Instanton Glass Generated by Noise in a Josephson-Junction Array
• Vortex excitations in the Insulating State of an Oxide Interface
• Tunneling probe of fluctuating superconductivity in disordered thin films
• Signature of Cooper Pairs in the Non-Superconducting Phases of Amorphous Superconducting Tantalum Films
• New paradigm for a disordered superconductor in a magnetic field
• Insulator-pseudogap crossover in the Lieb lattice
• Superconductor-insulator transition in Coulomb disorder
• Quasiparticle Screening near a Bosonic Superconductor-Insulator Transition Revealed by Magnetic Impurity Doping
• Effect of site dilution in the two-dimensional attractive Hubbard model
• Superconducting islands, phase fluctuations and the superconductor-insulator transition
• Fluctuation-induced odd-frequency spin-triplet pairing in disordered electron liquid
• Field-Induced Boson Insulating States in a 2D Superconducting Electron Gas with Strong Spin-Orbit Scatterings
• Highly tunable NbTiN Josephson junctions fabricated with focused helium ion beam
• Subgap two-particle spectral weight in disordered $s$-wave superconductors: Insights from mode coupling approach
• The effect of Coulomb interactions on the disorder driven superconductor-insulator transition: THz versus tunneling spectroscopy
• Proximitized insulators from disordered superconductors