Electrostatic- and Parallel Magnetic Field- Tuned Two Dimensional Superconductor-Insulator Transitions

Abstract

The 2D superconductor-insulator transition in disordered ultrathin amorphous bismuth films has been tuned both by electrostatic electron doping using the electric field effect and by the application of parallel magnetic fields. Electrostatic doping was carried out in both zero and nonzero magnetic fields, and magnetic tuning was conducted at multiple strengths of electrostatically induced superconductivity. The transitions were analyzed using finite size scaling with critical exponent products nu*z = 0.65-0.7. The parallel critical magnetic field increased with electron transfer as (dn_c-dn)^0.33, where dn is the electron transfer and dn_c is its critical value, and the critical resistance decreased linearly with dn. However at lower temperatures, in the insulating regime, the resistance became larger than expected from extrapolation of its temperature dependence at higher temperatures, and scaling failed. These observations imply that although the electrostatic- and parallel magnetic field- tuned superconductor-insulator transitions would appear to belong to the same universality class and to be delineated by a robust phase boundary that can be crossed either by tuning electron density or magnetic field, in the case of the field-tuned transition at the lowest temperatures, some different type of physical behavior turns on in the insulating regime.

About 11 pages, with 14 figures. To be submitted to Phys Rev B

References in corpus (30)

• Continuous Quantum Phase Transitions
• Quantum Criticality: competing ground states in low dimensions
• The superconductor-insulator transition in 2D dirty boson systems
• Superconductivity-Related Insulating Behavior
• Transport Through Quantum Melts
• Percolation-type description of the metal-insulator transition in two dimensions
• Thickness-Magnetic Field Phase Diagram at the Superconductor-Insulator Transition in 2D
• Superconductor-Insulator Transition in a Disordered Electronic System
• Electrostatic Tuning of the Superconductor-Insulator Transition in Two Dimensions
• Superconductivity in the insulating phase above the field-tuned superconductor-insulator transition in disordered indium oxide films
• Bose glass and Mott insulator phase in the disordered boson Hubbard model
• Superconducting fluctuations at low temperature
• Vortices and quasiparticles near the "superconductor-insulator" transition in thin films
• Destruction of localized electron pairs above the magnetic-field-driven superconductor-insulator transition in amorphous InO films
• True Superconductivity in a 2D "Superconducting-Insulating" System
• A Phase Glass is a Bose Metal: New Conducting State in 2D
• Evidence of Collective Charge Behavior in the Insulating State of Ultrathin Films of Superconducting Metals
• Universal conductivity in the boson Hubbard model in a magnetic field
• Superconductivity in disordered thin films: giant mesoscopic fluctuations
• The Field-Tuned Superconductor-Insulator Transition with and without Current Bias
• Scaling analysis of the magnetic-field-tuned quantum transition in superconducting amorphous In-O films
• Observation of the parallel-magnetic-field-induced superconductor-insulator transition in thin amorphous InO films
• Interaction-induced Bose Metal in 2D
• Finite temperature transport at the superconductor-insulator transition in disordered systems
• Suppression of 2D superconductivity by the magnetic field: quantum corrections vs superconductor-insulator transition
• Anomalous Parallel Field Negative Magnetoresistance in Ultrathin Films Near the Superconductor-Insulator Transition
• Anomalous Quantum Diffusion at the Superfluid-Insulator Transition
• Ginzburg-Landau theory of superconducting surfaces under electric fields
• Bottom-loading dilution refrigerator with ultra-high vacuum deposition capability
• A novel superconducting glass state in disordered thin films in Clogston limit

Cited by in corpus (16)

• Highly crystalline 2D superconductors
• Dominant mobility modulation by the electric field effect at the LaAlO_3 / SrTiO_3 interface
• Intrinsic spin-orbit coupling in superconducting δ-doped SrTiO3 heterostructures
• Superinsulator-Superconductor Duality in Two Dimensions
• Quantum Phase Transitions of Hard-Core Bosons in Background Potentials
• Magnetic Field Tuned Quantum Phase Transition in the Insulating Regime of Ultrathin Amorphous Bi Films
• Hot Electron Effects in the 2D Superconductor-Insulator Transition
• Field-Tuned Superconductor-Insulator Transition in BaPb1-xBixO3
• Absence of sizable superconductivity in hydrogen boride: A first principles study
• Superconducting-insulator transition in disordered Josephson junctions networks
• Quantum superconductor-insulator transition: Implications of BKT-critical behavior
• The Temperature dependence of the magneto-resistance peak in highly disordered superconductors
• Characterizing the insulator adjacent to the superconductor in Bi${}_2$Sr${}_{2-x}$La${}_x$CuO${}_{6+\delta }$ ($x=0.3$)
• Non linear transport properties of an insulating YBCO nano-bridge
• Onset of superconductor-insulator transition in an ultrathin NbN film under in-plane magnetic field studied by terahertz spectroscopy
• Superconductor insulator transition in thin films driven by an orbital parallel magnetic field effect