Physics – Condensed Matter – Disordered Systems and Neural Networks
Scientific paper
2007-03-06
Phys. Rev. B 75, 174205 (2007)
Physics
Condensed Matter
Disordered Systems and Neural Networks
10 figures
Scientific paper
10.1103/PhysRevB.75.174205
We study the dependence of the glassy properties of strongly localized indium-oxide films on the sample lateral dimensions. Characteristic mesoscopic effects such as reproducible conductance fluctuations (CF) are readily observable in gated structures for sample size smaller than 100 microns measured at 4K, and the relative amplitude of the CF decreases with the sample volume as does the flicker noise. By contrast, down to sample size of few microns, the non-equilibrium features that are attributed to the electron-glass are indistinguishable from those observed in macroscopic samples, and in particular, the relaxation dynamics is independent of sample size down to 2 microns. In addition, The usual features that characterize the electron-glass including slow-relaxation, memory effects, and full-aging behavior are all observed in the `mesoscopic' regime, and they appear to be independent of the conductance fluctuations.
Orlyanchik Vladimir
Ovadyahu Zvi
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