A Simple Model for Simple Aging in Glassy Yttrium-Hydrides

TL;DR

This paper proposes a straightforward model explaining the logarithmic aging observed in the photoconductivity of yttrium-hydride, attributing it to superimposed independent relaxations with distributed time offsets.

Contribution

It introduces a simple, physically motivated model that accounts for the aging behavior in yttrium-hydride without complex assumptions.

Findings

The model reproduces the logarithmic aging behavior.

Scaling of relaxation matches experimental data.

Independent relaxation processes explain the observed phenomena.

Abstract

A simple explanation for the logarithmic aging of the photoconductivity in yttriumhydride is proposed. We show that the scaling (``simple'' aging) of the relaxation response with the illumination time t_w is consistent with the superposition of independently relaxing excitations with time offsets distributed over a window of width t_w.