Interaction-induced Bose Metal in 2D

Abstract

We show here that the regularization of the conductivity resulting from the bosonic interactions on the `insulating' (quantum disordered) side of an insulator-superconductor transition in 2D gives rise to a metal with a finite conductivity, $\sigma =(2/\pi )4e^2/h$, as temperature tends to zero. The Bose metal is stable to weak disorder and hence represents a concrete example of an interaction-induced metallic phase. Phenomenological inclusion of dissipation reinstates the anticipated insulating behaviour in the quantum-disordered regime. Hence, we conclude that the traditionally-studied insulator-superconductor transition, which is driven solely by quantum fluctuations, corresponds to a superconductor-metal transition. The possible relationship to experiments on superconducting thin films in which a low-temperature metallic phase has been observed is discussed.

A figure has been added and the physics has been clarified. To appear in PRB

References in corpus (3)

• Zero-temperature d-wave superconducting phase transition
• Fluctuation Conductivity in Insulator-Superconductor Transitions with Dissipation
• Three-dimensional Josephson-junction arrays in the quantum regime

Cited by in corpus (27)

• Quantum phases of dipolar bosons in optical lattices
• Nature of the quantum phase transitions in the two-dimensional hardcore boson model
• Magnetically Induced Metallic Phase in Superconducting Tantalum Films
• D-wave correlated Critical Bose Liquids in two dimensions
• Vortices and quasiparticles near the "superconductor-insulator" transition in thin films
• 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
• Supermetal
• Anomalous proximity effect in an inhomogeneous disordered superconductor
• Exotic Gapless Mott Insulators of Bosons on Multi-Leg Ladders
• Electrostatic- and Parallel Magnetic Field- Tuned Two Dimensional Superconductor-Insulator Transitions
• Composite fermions and the field-tuned superconductor-insulator transition
• Bose-Luttinger Liquids
• Vortex Tunneling and Transport Theory In Two-Dimensional Bose Condensates
• Superconductor-insulator transition driven by local dephasing
• The Generic, Incommensurate Transition in the two-dimensional Boson Hubbard Model
• Anomalous Quantum Diffusion at the Superfluid-Insulator Transition
• Geometric frustration produces long-sought Bose metal phase of quantum matter
• Bose Metal as a Disruption of the Berezinskii-Kosterlitz-Thouless Transition in 2D Superconductors
• Effect of inhomogeneous coupling on superconductivity
• P-wave pairing and ferromagnetism in the metal-insulator transition in two dimensions
• Can Short-Range Interactions Mediate a Bose Metal Phase in 2D?
• Evidence of spatial inhomogeneity near the onset of magnetically induced insulating state in superconducting thin films
• AC Measurement of the Nernst effect of thin films at low temperatures
• Magneto-transport Properties near the Superconductor-Insulator Transition in 2D
• Bosons in fluctuating gauge fields: Bose metal and phase separation
• Dual Universality and Unconventional Phase Diagram of a Clean 2D Superconductor with Tunable Disorders