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Article Dans Une Revue Journal of Physics: Condensed Matter Année : 2022

Electron glass signatures up to room temperature in disordered insulators

Julien Delahaye
T Grenet

Résumé

This paper describes the observation of non-equilibrium field effects at room temperature in four disordered insulating systems: granular Al, discontinuous Au, amorphous NbSi and amorphous indium oxide thin films. The use of wide enough gate voltage ranges and a cautious analysis of the data allow us to uncover memory dips (MDs), the advocated hallmark of the electron glass, in the four systems. These MDs are found to relax slowly over days of measurements under gate voltage changes, reflecting the impossibility for the systems to reach an equilibrium state within experimentally accessible times. Our findings demonstrate that these electrical glassy effects, so far essentially reported at cryogenic temperatures, actually extend up to room temperature.
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Dates et versions

hal-03554332 , version 1 (03-02-2022)

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Julien Delahaye, T Grenet. Electron glass signatures up to room temperature in disordered insulators. Journal of Physics: Condensed Matter, 2022, 34 (13), pp.135603. ⟨10.1088/1361-648X/ac4a56⟩. ⟨hal-03554332⟩

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