Aging Effects Across the Metal-Insulator Transition in Two Dimensions

Abstract

Aging effects in the relaxations of conductivity of a two-dimensional electron system in Si have been studied as a function of carrier density. They reveal an abrupt change in the nature of the glassy phase at the metal-insulator transition (MIT): (a) while full aging is observed in the insulating regime, there are significant departures from full aging on the metallic side of the MIT, before the glassy phase disappears completely at a higher density $n_g$; (b) the amplitude of the relaxations peaks just below the MIT, and it is strongly suppressed in the insulating phase. Other aspects of aging, including large non-Gaussian noise and similarities to spin glasses, also have been discussed.

4+ pages, 5 figures; minor changes, accepted for publication in PRL

References in corpus (22)

• Metal-insulator transition in a weakly interacting many-electron system with localized single-particle states
• Metallic behavior and related phenomena in two dimensions
• Metal-insulator transition in two-dimensional electron systems
• Disorder-Driven Non-Fermi Liquid Behavior of Correlated Electrons
• Onset of Glassy Dynamics in a Two-Dimensional Electron System in Silicon
• Metal-insulator transitions and the effects of electron-electron interactions in two-dimensional electron systems
• Melting of the Electron Glass
• Universal Behavior of the Resistance Noise across the Metal-Insulator Transition in Silicon Inversion Layers
• Full Aging in Spin Glasses
• Stress-aging in the electron-glass
• Glassy behavior of electrons near metal-insulator transitions
• Symmetrical field effect and slow electron relaxation in granular aluminium
• Temperature and field dependence of Dynamics in the Electron-Glass
• Nonexponential Relaxations in a Two-Dimensional Electron System in Silicon
• Deviations from Perfect Memory in Spin Glass Temperature Cycling Experiments
• Landau theory of the Fermi-liquid to electron glass transition
• A quench-cooling procedure compared with the gate-protocol for aging experiments in the Electron-Glass
• Nonequilibrium Relaxations and Aging Effects in a Two-Dimensional Coulomb Glass
• Electron Glass in Ultrathin Granular Al Films at Low Temperatures
• Phase diagram of the metal-insulator transition in 2D electronic systems
• The Electron Glass in a Switchable Mirror: Relaxation, Aging and Universality
• Non-Gaussian conductance noise in disordered electronic systems due to a non-linear mechanism

Cited by in corpus (13)

• Transport in strongly correlated two dimensional electron fluids
• Electron Glass Dynamics
• Quantum charge glasses of itinerant fermions with cavity-mediated long-range interactions
• Huge (but finite) time scales in slow relaxations: beyond simple aging
• Critical Behavior of a Strongly Disordered 2D Electron System: The Cases of Long-Range and Screened Coulomb Interactions
• Conductance noise in an out-of-equilibrium two-dimensional electron system
• Temperature memory and resistive glassy behaviors of a perovskite manganite
• Glassy states in fermionic systems with strong disorder and interactions
• Non-equilibrium Relaxation and Aging Scaling of the Coulomb and Bose Glass
• Aging and memory in a two-dimensional electron system in Si
• Slow relaxations of magnetoresistance in AlGaAs-GaAs quantum well structures quenched in a magnetic field
• Screening the Coulomb interaction leads to a prethermal regime in two-dimensional bad conductors
• Structural Relaxation and Aging Scaling in the Coulomb and Bose Glass Models