Relaxation dynamics in quantum electron-glasses

Abstract

It is experimentally shown that, depending on the carrier-concentration of the system $n$, the dynamics of electron-glasses either \textit{slows down }with increasing temperature or it is \textit{independent} of it. This also correlates with the dependence of a typical relaxation time (or `viscosity') on $n$. These linked features are argued to be consistent with a model for dissipative tunneling. The slow relaxation of the electron glass may emerge then as a manifestation of friction in a many-body quantum system. Our considerations may also explain why strongly-localized granular metals are likely to show electron-glass effects while semiconductors are not.

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References in corpus (7)

• The glass transition and the Coulomb gap in electron glasses
• Time Dependent Development of the Coulomb Gap
• The Memory Effect in Electron Glasses
• Heterogeneous dynamics of the three dimensional Coulomb glass out of equilibrium
• Dissipative effects on quantum glassy systems
• Anderson Orthogonality Catastrophe in Disordered Systems
• Temperature and field dependence of Dynamics in the Electron-Glass

Cited by in corpus (29)

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• Manifestation of ageing in the low temperature conductance of disordered insulators
• Memory effects in transport through a hopping insulator: Understanding two-dip experiments
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• Slow Conductance Relaxation in Insulating Granular Al: Evidence for Screening Effects
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• Exponential Orthogonality Catastrophe at the Anderson Metal-Insulator Transition
• Infrared-Induced Sluggish Dynamics in the GeSbTe Electron Glass
• Conductance relaxation in GeBiTe - slow thermalization in an open quantum system
• Observation of thermally activated glassiness and memory dip in a-NbSi insulating thin films
• Screening the Coulomb interaction and thermalization of Anderson insulators
• Evidence for thermal activation in the glassy dynamics of insulating granular aluminum conductance
• Electron glass effects in amorphous NbSi films
• Charging of highly resistive granular metal films
• Low frequency excitations in the Coulomb Glass: numerical analysis using the avalanche method
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• Anomalous thermal activation of the electron glass dynamics in a-InOx and granular aluminum