Ulta-slow relaxation in discontinuous-film based electron glasses

Details Ulta-slow relaxation in discontinuous-film based electron glasses Ulta-slow relaxation in discontinuous-film based electron glasses

2012-04-05

arxiv.org/abs/1204.1142v1

Physics

Condensed Matter

Strongly Correlated Electrons

4 pages, 4 figures

Scientific paper

We present field effect measurements on discontinuous 2D thin films which are composed of a sub monolayer of nano-grains of Au, Ni, Ag or Al. Like other electron glasses these systems exhibit slow conductance relaxation and memory effects. However, unlike other systems, the discontinuous films exhibit a dramatic slowing down of the dynamics below a characteristic temperature $T^*$. $T^*$ is typically between 10-50K and is sample dependent. For $T

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