Ergodicity breaking in strong and network-forming glassy system

Details Ergodicity breaking in strong and network-forming glassy system Ergodicity breaking in strong and network-forming glassy system

2008-09-24

arxiv.org/abs/0809.4196v1

Physics

Condensed Matter

Disordered Systems and Neural Networks

Scientific paper

The temperature dependence of the non-ergodicity factor of vitreous GeO$_2$, $f_{q}(T)$, as deduced from elastic and quasi-elastic neutron scattering experiments, is analyzed. The data are collected in a wide range of temperatures from the glassy phase, up to the glass transition temperature, and well above into the undercooled liquid state. Notwithstanding the investigated system is classified as prototype of strong glass, it is found that the temperature- and the $q$-behavior of $f_{q}(T)$ follow some of the predictions of Mode Coupling Theory. The experimental data support the hypothesis of the existence of an ergodic to non-ergodic transition occurring also in network forming glassy systems.

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