Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Anomalous field effect and glassy behaviour in granular aluminium thin
  films: electron glass?   We present a study of non-equilibrium phenomena observed in the electrical
conductance of insulating granular aluminium thin films. An anomalous field
effect and its slow relaxation are studied in some detail. The phenomenology is
very similar to the one already observed in indium oxide. The origin of the
phenomena is discussed. In granular systems, the present experiments can
naturally be interpreted along two different lines. One relies on a slow
polarisation in the dielectric surrounding the metallic islands. The other one
relies on a purely electronic mechanism: the formation of an electron Coulomb
glass in the granular metal. More selective experiments and/or quantitative
predictions about the Coulomb glass properties are still needed to definitely
distinguish between the two scenarii.

31
The categories of this paper are: ao-sci
23
The categories of this paper are: solv-int
34
The categories of this paper are: chem-ph
17
The categories of this paper are: q-fin
19
The categories of this paper are: eess
6
The categories of this paper are: astro-ph
26
The categories of this paper are: bayes-an
10
The categories of this paper are: q-bio
0
The categories of this paper are: hep-ph
5
The categories of this paper are: gr-qc
3
The categories of this paper are: physics
28
The categories of this paper are: alg-geom
30
The categories of this paper are: q-alg
13
The categories of this paper are: quant-ph
1
The categories of this paper are: cs
8
The categories of this paper are: hep-ex