Electrostatic Tuning of the Superconductor-Insulator Transition in Two Dimensions

Abstract

Superconductivity has been induced in insulating ultra-thin films of amorphous bismuth using the electric field effect. The screening of electron-electron interaction was found to increase with electron concentration in a manner correlated with the tendency towards superconductivity. This does not preclude an increase in the density of states being important in the development of superconductivity. The superconductor-insulator transition appears to belong to the universality class of the three dimensional XY model.

Four pages, three figures. Revised slightly to reflect referees' comments

References in corpus (9)

• Continuous Quantum Phase Transitions
• Metallic behavior and related phenomena in two dimensions
• Superconductivity-Related Insulating Behavior
• The Elusive Bose Metal
• Effects of dissipation on quantum phase transitions
• Field-Effect Transistor on SrTiO3 with sputtered Al2O3 Gate Insulator
• Critical Exponents of the Superconducting Phase Transition
• Bottom-loading dilution refrigerator with ultra-high vacuum deposition capability
• Electric Field Effect in Ultrathin Films near the Superconductor-Insulator Transition

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• Two-dimensional Superconductors with Atomic-scale Thicknesses
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• Nernst effect as a probe of superconducting fluctuations in disordered thin films
• Electrostatic- and Parallel Magnetic Field- Tuned Two Dimensional Superconductor-Insulator Transitions
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• Two-band superfluidity from the BCS to the BEC limit
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• Evidence of Spatially Inhomogeous Pairing on the Insulating Side of a Disorder-Tuned Superconductor-Insulator Transition
• 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
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• Electrostatic Tuning of the Properties of Disordered Indium Oxide Films near the Superconductor-Insulator Transition
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• Sequential superconductor-Bose insulator-Fermi insulator phase transitions in two-dimensional a-WSi
• Continuous and reversible tuning of the disorder-driven superconductor-insulator transition in bilayer graphene
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• Tunneling probe of fluctuating superconductivity in disordered thin films
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• Superconducting-insulator transition in disordered Josephson junctions networks
• Superconductor-insulator transition in Coulomb disorder
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• Screened Coulomb interactions of general macroions with nonzero particle volume
• Indications for sharp continuous phase transitions at finite temperatures connected with the apparent metal-insulator transition in two-dimensional disordered systems
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• Density Induced Quantum Phase Transitions in Triplet Superconductors
• Not Just a Phase: Bose Metal Unveiled
• Applied electric field instead of pressure in H-based superconductors
• Proximitized insulators from disordered superconductors
• Voltage Controlled Switching Phenomenon in Disordered Superconductors
• Gate voltage tuned quantum superconductor to insulator transition in an ultrathin bismuth film revisited