Excessive Noise as a Test for Many-Body Localization

Abstract

Recent experimental reports suggested the existence of a finite-temperature insulator in the vicinity of the superconductor-insulator transition. The rapid decay of conductivity over a narrow temperature range was theoretically linked to both a finite-temperature transition to a many-body-localized state, and to a charge-Berezinskii Kosterlitz Thouless transition. Here we report of low-frequency noise measurements of such insulators to test for many body localization. We observed a huge enhancement of the low-temperatures noise when exceeding a threshold voltage for nonlinear conductivity and discuss our results in light of the theoretical models.

arXiv comment5 pages, 4 figures

References in corpus (21)

• Shot Noise in Mesoscopic Conductors
• Metal-insulator transition in a weakly interacting many-electron system with localized single-particle states
• Nature of the superconductor-insulator transition in disordered superconductors
• Disorder-Induced Inhomogeneities of the Superconducting State Close to the Superconductor-Insulator Transition
• Fractal superconductivity near localization threshold
• Superconductivity-Related Insulating Behavior
• Localized Superconductivity in the Quantum-Critical Region of the Disorder-Driven Superconductor-Insulator Transition in TiN Thin Films
• Single and two-particle energy gaps across the disorder-driven superconductor-insulator transition
• Experimental evidence for a collective insulating state in two-dimensional superconductors
• Superconductivity in the insulating phase above the field-tuned superconductor-insulator transition in disordered indium oxide films
• Possible experimental manifestations of the many-body localization
• Evidence for a Finite Temperature Insulator
• Jumps in current-voltage characteristics in disordered films
• Destruction of localized electron pairs above the magnetic-field-driven superconductor-insulator transition in amorphous InO films
• Survival of superconducting correlations across the 2D superconductor-insulator transition: A finite frequency study
• Observation of Giant Positive Magnetoresistance in a Cooper Pair Insulator
• Dephasing and weak localization in disordered Luttinger liquid
• High field termination of a Cooper-pair insulator
• Cooper pairs under the action of disorder and strong magnetic field
• A Direct Determination of the Temperature of Overheated Electrons in an Insulator
• Non-equilibrium restoration of duality symmetry in the vicinity of the superconductor-insulator transition

Cited by in corpus (5)

• Dynamics and Transport at the Threshold of Many-Body Localization
• Local integrals of motion and the quasiperiodic many-body localization transition
• Excess noise in the anomalous metallic phase in amorphous indium oxide
• Screening the Coulomb interaction leads to a prethermal regime in two-dimensional bad conductors
• Superconducting phase transitions in disordered NbTiN films