The Electron Glass in a Switchable Mirror: Relaxation, Aging and Universality

Abstract

The rare earth hydride YH${}_{3-\delta }$ can be tuned through the metal-insulator transition both by changing $\delta$ and by illumination with ultraviolet light. The transition is dominated by strong electron-electron interactions, with transport in the insulator sensitive to both a Coulomb gap and persistent quantum fluctuations. Via a systematic variation of UV illumination time, photon flux, Coulomb gap depth, and temperature, we demonstrate that polycrystalline YH${}_{3-\delta }$ serves as a model system for studying the properties of the interacting electron glass. Prominent among its features are logarithmic relaxation, aging, and universal scaling of the conductivity.

References in corpus (12)

• Theory for Metal Hydrides with Switchable Optical Properties
• Electronic Structure of Lanthanum Hydrides with Switchable Optical Properties
• Time Dependent Development of the Coulomb Gap
• Stress-aging in the electron-glass
• Kondo--lattice-like effects of hydrogen in transition metals
• Symmetrical field effect and slow electron relaxation in granular aluminium
• Log-Poisson statistics and full aging in glassy systems
• Off-equilibrium dynamics of the two-dimensional Coulomb glass
• Heterogeneous dynamics of the three dimensional Coulomb glass out of equilibrium
• History-dependent relaxation and the energy scale of correlation in the Electron-Glass
• Numerical study of relaxation in electron glasses
• Stretched exponential relaxation in the Coulomb glass

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• Aging Effects Across the Metal-Insulator Transition in Two Dimensions
• Aging and intermittency in a p-spin model of a glass
• Temperature memory and resistive glassy behaviors of a perovskite manganite
• Quantum fluctuations lead to glassy electron dynamics in the good metal regime of electron doped KTaO3